The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A215576

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

G.f. satisfies A(x) = (1 + x^2)*(1 + x*A(x)^2).
(history; published version)

#28 by Alois P. Heinz at Tue Jul 18 10:42:48 EDT 2023

STATUS

reviewed

approved

#27 by Michel Marcus at Tue Jul 18 09:49:00 EDT 2023

STATUS

proposed

reviewed

#26 by Seiichi Manyama at Tue Jul 18 09:44:19 EDT 2023

STATUS

editing

proposed

#25 by Seiichi Manyama at Tue Jul 18 09:06:08 EDT 2023

FORMULA

a(n) = Sum_{i=0..floor(n/2)} C(2*n-4*i+1,i)*C(2*n-4*i+1,n-2*i)/(2*n-4*i+1). - Vladimir Kruchinin, Oct 11 2018

#24 by Seiichi Manyama at Tue Jul 18 09:01:29 EDT 2023

CROSSREFS

STATUS

approved

editing

#23 by OEIS Server at Tue Jul 18 02:10:01 EDT 2023

LINKS

Seiichi Manyama, <a href="/A215576/b215576_1.txt">Table of n, a(n) for n = 0..1000</a>

#22 by Joerg Arndt at Tue Jul 18 02:10:01 EDT 2023

STATUS

reviewed

approved

Discussion

Tue Jul 18

02:10

OEIS Server: Installed first b-file as b215576.txt.

#21 by Michel Marcus at Tue Jul 18 01:11:16 EDT 2023

STATUS

proposed

reviewed

#20 by Seiichi Manyama at Tue Jul 18 00:52:56 EDT 2023

STATUS

editing

proposed

#19 by Seiichi Manyama at Tue Jul 18 00:22:58 EDT 2023

LINKS

Seiichi Manyama, <a href="/A215576/b215576_1.txt">Table of n, a(n) for n = 0..1000</a>