A092468 - cp's OEIS frontend

A092468 a(n) = Sum_{i+j+k=n, 0<=i<=j<=k<=n} (n+2k)!/(i! * j! * (3*k)!).

n	a(n)
0	1
1	1
2	3
3	24
4	71
5	366
6	2142
7	8128
8	40063
9	223182
10	919600
11	4477496
12	24423998
13	104469379
14	508145588
15	2726623094
16	11936904927
17	58101760966
18	307770506832
19	1369729219470
20	6671075408724
21	34985537652681
22	157621462924548

[1, 1, 3, 24, 71, 366, 2142, 8128, 40063, 223182, 919600, 4477496, 24423998, 104469379, 508145588, 2726623094, 11936904927, 58101760966, 307770506832, 1369729219470, 6671075408724, 34985537652681, 157621462924548]

cp's OEIS Frontend

A092468 a(n) = Sum_{i+j+k=n, 0<=i<=j<=k<=n} (n+2k)!/(i! * j! * (3*k)!).

Table of values

List of values