A322241 - cp's OEIS frontend

A322241 G.f.: exp( Sum_{n>=1} A084605(n)^2 * x^n/n ), where A084605(n) is the central coefficient in (1 + x + 4*x^2)^n.

n	a(n)
0	1
1	1
2	41
3	249
4	6305
5	77569
6	1665321
7	27724889
8	574252417
9	10958980929
10	228679916905
11	4671350051321
12	99292476904609
13	2107949882690241
14	45658568907254505
15	993562984208479193
16	21876513296218002433
17	484448162130512673665
18	10812975015547281792937
19	242647271141110287979513
20	5477046865641884201456033

[1, 1, 41, 249, 6305, 77569, 1665321, 27724889, 574252417, 10958980929, 228679916905, 4671350051321, 99292476904609, 2107949882690241, 45658568907254505, 993562984208479193, 21876513296218002433, 484448162130512673665, 10812975015547281792937, 242647271141110287979513, 5477046865641884201456033]

cp's OEIS Frontend

A322241 G.f.: exp( Sum_{n>=1} A084605(n)^2 * x^n/n ), where A084605(n) is the central coefficient in (1 + x + 4*x^2)^n.

Table of values

List of values