A368771 - cp's OEIS frontend

A368771 a(n) = (n!)^3 * Sum_{k=0..n} k^2/(k!)^3.

n	a(n)
0	0
1	1
2	12
3	333
4	21328
5	2666025
6	575861436
7	197520472597
8	101130481969728
9	73724121355931793
10	73724121355931793100
11	98126805524745216616221
12	169563119946759734312830032
13	372530174523031136285287580473
14	1022222798891197437966829120818108

[0, 1, 12, 333, 21328, 2666025, 575861436, 197520472597, 101130481969728, 73724121355931793, 73724121355931793100, 98126805524745216616221, 169563119946759734312830032, 372530174523031136285287580473, 1022222798891197437966829120818108]

cp's OEIS Frontend

A368771 a(n) = (n!)^3 * Sum_{k=0..n} k^2/(k!)^3.

Table of values

List of values