A144511 - cp's OEIS frontend

A144511 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(3!i!j!*k!).

n	a(n)
0	0
1	1
2	37
3	842
4	18252
5	405408
6	9268549
7	216864652
8	5165454442
9	124762262630
10	3047235458767
11	75109521108771
12	1865470016184352
13	46631215889276662
14	1172088706950306293
15	29601905040172054928
16	750748513858793527974
17	19110455782881086439234
18	488057675380082251617235

[0, 1, 37, 842, 18252, 405408, 9268549, 216864652, 5165454442, 124762262630, 3047235458767, 75109521108771, 1865470016184352, 46631215889276662, 1172088706950306293, 29601905040172054928, 750748513858793527974, 19110455782881086439234, 488057675380082251617235]

cp's OEIS Frontend

A144511 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(3!i!j!*k!).

Table of values

List of values

cp's OEIS Frontend

A144511 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(3!*i!*j!*k!).

Table of values

List of values

A144511 a(n) = Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} (i+j+k)!/(3!i!j!*k!).