A144660 - cp's OEIS frontend

A144660 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} (i+j+k)!/(i!j!k!).

n	a(n)
0	1
1	16
2	271
3	5248
4	110251
5	2435200
6	55621567
7	1301226496
8	30992872483
9	748574130016
10	18283414868863
11	450657134765056
12	11192820128307871
13	279787295456009728
14	7032532242167190271
15	177611430242835570688
16	4504491083159761986451
17	114662734697313744041248

[1, 16, 271, 5248, 110251, 2435200, 55621567, 1301226496, 30992872483, 748574130016, 18283414868863, 450657134765056, 11192820128307871, 279787295456009728, 7032532242167190271, 177611430242835570688, 4504491083159761986451, 114662734697313744041248]

cp's OEIS Frontend

A144660 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} (i+j+k)!/(i!j!k!).

Table of values

List of values

cp's OEIS Frontend

A144660 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} (i+j+k)!/(i!*j!*k!).

Table of values

List of values

A144660 a(n) = Sum_{i=0..n} Sum_{j=0..n} Sum_{k=0..n} (i+j+k)!/(i!j!k!).