The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A128579

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A128579

Antidiagonal sums of table A128570.
(history; published version)

#6 by Vaclav Kotesovec at Sat Mar 19 09:03:43 EDT 2016

STATUS

editing

approved

#5 by Vaclav Kotesovec at Sat Mar 19 08:51:36 EDT 2016

FORMULA

a(n) ~ exp(1/2) * A128318(n). - Vaclav Kotesovec, Mar 19 2016

#4 by Vaclav Kotesovec at Sat Mar 19 08:46:54 EDT 2016

LINKS

Vaclav Kotesovec, <a href="/A128579/b128579.txt">Table of n, a(n) for n = 0..200</a>

STATUS

approved

editing

#3 by Russ Cox at Fri Mar 30 18:37:03 EDT 2012

AUTHOR

_Paul D. Hanna (pauldhanna(AT)juno.com), _, Mar 11 2007

Discussion

Fri Mar 30

18:37

OEIS Server: https://oeis.org/edit/global/213

#2 by N. J. A. Sloane at Sat Nov 10 03:00:00 EST 2007

KEYWORD

nonn,new

nonn

AUTHOR

Paul D . Hanna (pauldhanna(AT)juno.com), Mar 11 2007

#1 by N. J. A. Sloane at Fri May 11 03:00:00 EDT 2007

NAME

Antidiagonal sums of table A128570.

DATA

1, 2, 7, 44, 419, 5254, 80687, 1458524, 30259147, 707813762, 18421139495, 527856303160, 16513700403347, 560082210938174, 20471657576850655, 802275966701866964, 33560323690860843995, 1492638035099491033402

OFFSET

0,2

PROG

(PARI) {a(n)=local(F=1+x, A=0); for(k=0, n, for(j=0, k, F=1+(n+1-j)*x*F^2 +x*O(x^k)); A+=polcoeff(F, k)); A}

CROSSREFS

Cf. A128570 (triangle), rows: A128318, A128571, A128572, A128573, A128574, A128575, A128576; A128577 (square of row 0), A128578 (main diagonal).

KEYWORD

nonn

AUTHOR

Paul D Hanna (pauldhanna(AT)juno.com), Mar 11 2007

STATUS

approved