A343673 - cp's OEIS frontend

A343673 a(0) = 1; a(n) = 3 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * a(k).

n	a(n)
0	1
1	4
2	33
3	409
4	6759
5	139621
6	3460989
7	100091335
8	3308146179
9	123005753041
10	5081871122073
11	230948185830187
12	11449697796242319
13	614944043618257237
14	35568197580789653685
15	2204201734650777596863
16	145703352769994600516187
17	10233323176300508748808921
18	761004837938469796089586257

[1, 4, 33, 409, 6759, 139621, 3460989, 100091335, 3308146179, 123005753041, 5081871122073, 230948185830187, 11449697796242319, 614944043618257237, 35568197580789653685, 2204201734650777596863, 145703352769994600516187, 10233323176300508748808921, 761004837938469796089586257]

cp's OEIS Frontend

A343673 a(0) = 1; a(n) = 3 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * a(k).

Table of values

List of values