A069948 - cp's OEIS frontend

A069948 a(n) = 1/exp(1) * Sum_{k>=0} (k+n)!^2 / k!^3.

n	a(n)
0	1
1	5
2	87
3	2971
4	163121
5	12962661
6	1395857215
7	194634226067
8	33990369362241
9	7247035915622821
10	1848636684656077991
11	555005864462114884875
12	193458213840943964983537
13	77399534126148191747554181
14	35196002960227350045891984591
15	18037244723394790042393195636291

[1, 5, 87, 2971, 163121, 12962661, 1395857215, 194634226067, 33990369362241, 7247035915622821, 1848636684656077991, 555005864462114884875, 193458213840943964983537, 77399534126148191747554181, 35196002960227350045891984591, 18037244723394790042393195636291]

cp's OEIS Frontend

A069948 a(n) = 1/exp(1) * Sum_{k>=0} (k+n)!^2 / k!^3.

Table of values

List of values