A337594 - cp's OEIS frontend

A337594 a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * k * 4^(k-1) * a(n-k).

n	a(n)
0	1
1	1
2	6
3	58
4	920
5	21176
6	654960
7	26114768
8	1298070912
9	78359732608
10	5630565514496
11	473796572027648
12	46060380961356800
13	5114737212582603776
14	642502387594286036992
15	90542358999393528670208
16	14209873001490130067095552
17	2467784343879850163370295296
18	471558856613839054976849608704

[1, 1, 6, 58, 920, 21176, 654960, 26114768, 1298070912, 78359732608, 5630565514496, 473796572027648, 46060380961356800, 5114737212582603776, 642502387594286036992, 90542358999393528670208, 14209873001490130067095552, 2467784343879850163370295296, 471558856613839054976849608704]

cp's OEIS Frontend

A337594 a(0) = 1; a(n) = (1/n) * Sum_{k=1..n} binomial(n,k)^2 * k * 4^(k-1) * a(n-k).

Table of values

List of values