The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A331551 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A331551

Expansion of (1 + 3*x)/(1 + 2*x + 9*x^2)^(3/2).
(history; published version)

#29 by Charles R Greathouse IV at Thu Sep 08 08:46:25 EDT 2022

PROG

(MAGMAMagma) R<x>:=PowerSeriesRing(Rationals(), 25); Coefficients(R!( (1 + 3*x)/(1 + 2*x + 9*x^2)^(3/2))); // Marius A. Burtea, Jan 20 2020

Discussion

Thu Sep 08

08:46

OEIS Server: https://oeis.org/edit/global/2944

#28 by Susanna Cuyler at Sat Jan 25 20:56:13 EST 2020

STATUS

reviewed

approved

#27 by Andrew Howroyd at Sat Jan 25 13:37:49 EST 2020

STATUS

proposed

reviewed

#26 by Seiichi Manyama at Sat Jan 25 12:07:16 EST 2020

STATUS

editing

proposed

#25 by Seiichi Manyama at Sat Jan 25 12:04:35 EST 2020

FORMULA

n * (2*n-1) * a(n) = 4 * (-n^2 + 1) * a(n-1,k) - 9 * n * (2*n+1) * a(n-2) for n>1. - Seiichi Manyama, Jan 25 2020

#24 by Seiichi Manyama at Sat Jan 25 11:56:41 EST 2020

FORMULA

n * (2*n-1) * a(n) = 4 * (-n^2 + 1) * a(n-1,k) - 9 * n * (2*n+1) * a(n-2) for n>1. - Seiichi Manyama, Jan 25 2020

STATUS

approved

editing

#23 by Joerg Arndt at Sat Jan 25 01:44:37 EST 2020

STATUS

reviewed

approved

#22 by Michel Marcus at Sat Jan 25 01:13:12 EST 2020

STATUS

proposed

reviewed

#21 by Seiichi Manyama at Sat Jan 25 01:11:02 EST 2020

STATUS

editing

proposed

#20 by Seiichi Manyama at Sat Jan 25 01:10:41 EST 2020

LINKS

Seiichi Manyama, <a href="/A331551/b331551.txt">Table of n, a(n) for n = 0..1000</a>

STATUS

approved

editing