A307352 - cp's OEIS frontend

A307352 a(n) = Sum_{0<=i<=j<=k<=n} (i+j+k)!/(i!j!k!).

n	a(n)
0	1
1	10
2	152
3	2857
4	59258
5	1299434
6	29540536
7	688792297
8	16365424655
9	394524030964
10	9621387028097
11	236859068544553
12	5876752849424588
13	146774130990116924
14	3686474939260449666
15	93044751867820344115
16	2358431594464812420404
17	60004708149086107604240

[1, 10, 152, 2857, 59258, 1299434, 29540536, 688792297, 16365424655, 394524030964, 9621387028097, 236859068544553, 5876752849424588, 146774130990116924, 3686474939260449666, 93044751867820344115, 2358431594464812420404, 60004708149086107604240]

cp's OEIS Frontend

A307352 a(n) = Sum_{0<=i<=j<=k<=n} (i+j+k)!/(i!j!k!).

Table of values

List of values

cp's OEIS Frontend

A307352 a(n) = Sum_{0<=i<=j<=k<=n} (i+j+k)!/(i!*j!*k!).

Table of values

List of values

A307352 a(n) = Sum_{0<=i<=j<=k<=n} (i+j+k)!/(i!j!k!).