The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A032105

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A032105

Number of series-reduced dyslexic identity planted planar trees with n leaves of 2 colors.
(history; published version)

#10 by Alois P. Heinz at Thu Aug 30 15:04:56 EDT 2018

STATUS

proposed

approved

#9 by Andrew Howroyd at Thu Aug 30 14:10:03 EDT 2018

STATUS

editing

proposed

#8 by Andrew Howroyd at Thu Aug 30 14:00:06 EDT 2018

LINKS

Andrew Howroyd, <a href="/A032105/b032105.txt">Table of n, a(n) for n = 1..200</a>

C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

PROG

(PARI)

BHK(p)={p + (1/(1-p) - (1+p)/subst(1-p, x, x^2))/2}

seq(n)={my(p=2*x); for(i=2, n, p+=x^i*polcoeff(BHK(p) + O(x*x^i), i)); Vecrev(p/x)} \\ Andrew Howroyd, Aug 30 2018

STATUS

approved

editing

#7 by Russ Cox at Fri Mar 30 17:37:01 EDT 2012

AUTHOR

_Christian G. Bower (bowerc(AT)usa.net)_

Discussion

Fri Mar 30

17:37

OEIS Server: https://oeis.org/edit/global/178

#6 by Russ Cox at Sun Jul 10 18:22:33 EDT 2011

LINKS

<a href="/Sindx_index/Ro.html#rooted">Index entries for sequences related to rooted trees</a>

Discussion

Sun Jul 10

18:22

OEIS Server: https://oeis.org/edit/global/79

#5 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

<a href="/Sindx_Ro.html#rooted">Index entries for sequences related to rooted trees</a>

KEYWORD

nonn,new

nonn

#4 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

LINKS

<a href="http://www.research.att.com/~njas/sequences/Sindx_Ro.html#rooted">Index entries for sequences related to rooted trees</a>

KEYWORD

nonn,new

nonn

#3 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004

NAME

Series Number of series-reduced dyslexic identity planted planar trees of with n leaves of 2 colors.

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

LINKS

<a href="http://www.research.att.com/~njas/sequences/Sindx_RRo.html#rooted">Index entries for sequences related to rooted trees</a>

KEYWORD

nonn,new

nonn

AUTHOR

Christian G. Bower (bowerc@(AT)usa.net)

#1 by N. J. A. Sloane at Sat Dec 11 03:00:00 EST 1999

NAME

Series reduced dyslexic identity planted planar trees of n leaves of 2 colors.

DATA

2, 1, 4, 19, 92, 468, 2470, 13394, 74296, 419463, 2403502, 13941202, 81707264, 483131437, 2878697568, 17267416917, 104186446502, 631913206482, 3850548301808, 23561351983192, 144715120126370

OFFSET

1,1

LINKS

<a href="http://www.research.att.com/~njas/sequences/Sindx_R.html#rooted">Index entries for sequences related to rooted trees</a>

FORMULA

Doubles (index 2+) under "BHK" (reversible, identity, unlabeled) transform.

KEYWORD

nonn

AUTHOR

Christian G. Bower ([email protected])

STATUS

approved