A346764 - cp's OEIS frontend

A346764 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(3k,k) / (2k + 1).

n	a(n)
0	1
1	1
2	4
3	22
4	149
5	1169
6	10272
7	99012
8	1032346
9	11526094
10	136755650
11	1714031312
12	22584475206
13	311597054110
14	4486616619986
15	67227958200996
16	1045724188868353
17	16849477086762701
18	280694278424099214
19	4826423610068933738
20	85527389275821664161
21	1559842051063534891301

[1, 1, 4, 22, 149, 1169, 10272, 99012, 1032346, 11526094, 136755650, 1714031312, 22584475206, 311597054110, 4486616619986, 67227958200996, 1045724188868353, 16849477086762701, 280694278424099214, 4826423610068933738, 85527389275821664161, 1559842051063534891301]

cp's OEIS Frontend

A346764 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(3k,k) / (2k + 1).

Table of values

List of values

cp's OEIS Frontend

A346764 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(3*k,k) / (2*k + 1).

Table of values

List of values

A346764 a(n) = Sum_{k=0..n} Stirling2(n,k) * binomial(3k,k) / (2k + 1).