A343685 - cp's OEIS frontend

A343685 a(0) = 1; a(n) = 2 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

n	a(n)
0	1
1	3
2	19
3	182
4	2328
5	37234
6	714674
7	16004064
8	409587144
9	11792756640
10	377261048592
11	13275818803488
12	509646721402032
13	21195285059025648
14	949279217570464944
15	45552467588773815744
16	2331624264279599225088
17	126804353256754734370176
18	7301857349340031590836352
19	443826900013575494233057536

[1, 3, 19, 182, 2328, 37234, 714674, 16004064, 409587144, 11792756640, 377261048592, 13275818803488, 509646721402032, 21195285059025648, 949279217570464944, 45552467588773815744, 2331624264279599225088, 126804353256754734370176, 7301857349340031590836352, 443826900013575494233057536]

cp's OEIS Frontend

A343685 a(0) = 1; a(n) = 2 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

Table of values

List of values