A343687 - cp's OEIS frontend

A343687 a(0) = 1; a(n) = 4 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

n	a(n)
0	1
1	5
2	51
3	782
4	15992
5	408814
6	12541010
7	448834728
8	18358297416
9	844755218400
10	43190363326992
11	2429044756967520
12	149029669269441456
13	9905401062535389072
14	709016063545908259248
15	54375505616232613595904
16	4448148376192382963462400
17	386619861956492109750650496
18	35580548688887294090357622912

[1, 5, 51, 782, 15992, 408814, 12541010, 448834728, 18358297416, 844755218400, 43190363326992, 2429044756967520, 149029669269441456, 9905401062535389072, 709016063545908259248, 54375505616232613595904, 4448148376192382963462400, 386619861956492109750650496, 35580548688887294090357622912]

cp's OEIS Frontend

A343687 a(0) = 1; a(n) = 4 * n * a(n-1) + Sum_{k=0..n-1} binomial(n,k) * (n-k-1)! * a(k).

Table of values

List of values