A092469 - cp's OEIS frontend

A092469 a(n) = Sum_{i+j+k=n, 0<=i<=j<=k<=n} (n+2j)!/(i! * (3j)! * k!).

n	a(n)
0	1
1	1
2	13
3	91
4	1081
5	10606
6	181189
7	2025325
8	38378449
9	548523856
10	10811257051
11	176339404099
12	3828413138785
13	68734868302738
14	1590128353317001
15	31543123841374681
16	768191679788034529
17	16494997547298477340

[1, 1, 13, 91, 1081, 10606, 181189, 2025325, 38378449, 548523856, 10811257051, 176339404099, 3828413138785, 68734868302738, 1590128353317001, 31543123841374681, 768191679788034529, 16494997547298477340]

cp's OEIS Frontend

A092469 a(n) = Sum_{i+j+k=n, 0<=i<=j<=k<=n} (n+2j)!/(i! * (3j)! * k!).

Table of values

List of values