A144658 - cp's OEIS frontend

A144658 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(i!j!k!).

n	a(n)
0	0
1	6
2	222
3	5052
4	109512
5	2432448
6	55611294
7	1301187912
8	30992726652
9	748573575780
10	18283412752602
11	450657126652626
12	11192820097106112
13	279787295335659972
14	7032532241701837758
15	177611430241032329568

[0, 6, 222, 5052, 109512, 2432448, 55611294, 1301187912, 30992726652, 748573575780, 18283412752602, 450657126652626, 11192820097106112, 279787295335659972, 7032532241701837758, 177611430241032329568]

cp's OEIS Frontend

A144658 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(i!j!k!).

Table of values

List of values

cp's OEIS Frontend

A144658 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(i!*j!*k!).

Table of values

List of values

A144658 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(i!j!k!).