A343686 - cp's OEIS frontend

A343686 a(0) = 1; a(n) = 3 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

n	a(n)
0	1
1	4
2	33
3	410
4	6796
5	140824
6	3501782
7	101589732
8	3368237928
9	125634319104
10	5206805098752
11	237370661584704
12	11805144854303760
13	636030155604374400
14	36903603627294958416
15	2294156656214759133024
16	152126925169297299197184
17	10718105879980375520103936
18	799564645068022035991527552

[1, 4, 33, 410, 6796, 140824, 3501782, 101589732, 3368237928, 125634319104, 5206805098752, 237370661584704, 11805144854303760, 636030155604374400, 36903603627294958416, 2294156656214759133024, 152126925169297299197184, 10718105879980375520103936, 799564645068022035991527552]

cp's OEIS Frontend

A343686 a(0) = 1; a(n) = 3 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

Table of values

List of values