A333985 - cp's OEIS frontend

A333985 a(0) = 0; a(n) = 6^(n-1) + (1/n) * Sum_{k=1..n-1} binomial(n,k)^2 * 6^(k-1) * (n-k) * a(n-k).

n	a(n)
0	0
1	1
2	8
3	102
4	2448
5	99576
6	6070032
7	517803840
8	58901955840
9	8614609282944
10	1574889814326528
11	351896788824053760
12	94354291010501932032
13	29899137879209196380160
14	11053567519385396409446400
15	4715135497874174650128617472
16	2298676381054790419739595571200
17	1270045124912998373344157769891840

[0, 1, 8, 102, 2448, 99576, 6070032, 517803840, 58901955840, 8614609282944, 1574889814326528, 351896788824053760, 94354291010501932032, 29899137879209196380160, 11053567519385396409446400, 4715135497874174650128617472, 2298676381054790419739595571200, 1270045124912998373344157769891840]

cp's OEIS Frontend

A333985 a(0) = 0; a(n) = 6^(n-1) + (1/n) * Sum_{k=1..n-1} binomial(n,k)^2 * 6^(k-1) * (n-k) * a(n-k).

Table of values

List of values