The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A032237

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A032237

Shifts left 2 places under "DGK" (bracelet, element, unlabeled) transform.
(history; published version)

#10 by Alois P. Heinz at Thu Sep 20 16:51:39 EDT 2018

STATUS

proposed

approved

#9 by Andrew Howroyd at Thu Sep 20 15:33:30 EDT 2018

STATUS

editing

proposed

#8 by Andrew Howroyd at Thu Sep 20 15:26:10 EDT 2018

LINKS

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

#7 by Andrew Howroyd at Thu Sep 20 14:18:47 EDT 2018

LINKS

Andrew Howroyd, <a href="/A032237/b032237.txt">Table of n, a(n) for n = 1..200</a>

PROG

(PARI)

DGK(v)={apply(p->subst(serlaplace(p/y + polcoeff(p, 1) + polcoeff(p, 2)), y, 1)/2, Vec(prod(k=1, #v, (1 + x^k*y + O(x*x^#v))^v[k])-1, -#v))}

seq(n)={my(v=vector(2-n%2, i, 1)); for(i=1, (n-1)\2, v=concat([1, 1], DGK(v))); v} \\ Andrew Howroyd, Sep 20 2018

STATUS

approved

editing

#6 by Russ Cox at Fri Mar 30 17:37:02 EDT 2012

AUTHOR

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

Discussion

Fri Mar 30

17:37

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

#5 by Russ Cox at Sun Jul 10 18:41:18 EDT 2011

LINKS

<a href="/Sindx_index/Mo.html#mobiles">Index entries for sequences related to mobiles</a>

Discussion

Sun Jul 10

18:41

OEIS Server: https://oeis.org/edit/global/59

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

LINKS

<a href="/Sindx_Mo.html#mobiles">Index entries for sequences related to mobiles</a>

KEYWORD

nonn,eigen,new

#3 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_Mo.html#mobiles">Index entries for sequences related to mobiles</a>

KEYWORD

nonn,eigen,new

#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_MMo.html#mobiles">Index entries for sequences related to mobiles</a>

KEYWORD

nonn,eigen,new

AUTHOR

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

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

NAME

Shifts left 2 places under "DGK" (bracelet, element, unlabeled) transform.

DATA

1, 1, 1, 1, 2, 2, 4, 6, 10, 17, 29, 53, 93, 169, 308, 566, 1068, 1975, 3742, 7061, 13427, 25634, 49151, 94474, 182262, 352361, 683304, 1327941, 2586839, 5049398, 9873715, 19343014, 37952032, 74584811, 146783263, 289264739

OFFSET

1,5

LINKS

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

KEYWORD

nonn,eigen

AUTHOR

Christian G. Bower ([email protected])

STATUS

approved