A368854 - cp's OEIS frontend

A368854 a(n) = n! * (n+1)! * (n+2)! * Sum_{k=0..n} (-1)^k/(k! * (k+1)! * (k+2)!).

n	a(n)
0	1
1	5
2	121
3	7259
4	871081
5	182927009
6	61463475025
7	30977591412599
8	22303865817071281
9	22080827158900568189
10	29146691849748750009481
11	50015723214168855016269395
12	109234339499744779355532358681
13	298209746834303247640603339199129

[1, 5, 121, 7259, 871081, 182927009, 61463475025, 30977591412599, 22303865817071281, 22080827158900568189, 29146691849748750009481, 50015723214168855016269395, 109234339499744779355532358681, 298209746834303247640603339199129]

cp's OEIS Frontend

A368854 a(n) = n! * (n+1)! * (n+2)! * Sum_{k=0..n} (-1)^k/(k! * (k+1)! * (k+2)!).

Table of values

List of values