A222033 - cp's OEIS frontend

A222033 G.f.: Sum_{n>=0} Product_{k=1..n} (1 - 1/(1+k*x)^3).

n	a(n)
0	1
1	3
2	12
3	64
4	429
5	3459
6	32578
7	350928
8	4254819
9	57339343
10	850210608
11	13755324192
12	241123857361
13	4552433489355
14	92097902228022
15	1987543508858416
16	45576279808372215
17	1106640757105043895
18	28364428977533987380
19	765303225207132783360
20	21681823874743612308981

[1, 3, 12, 64, 429, 3459, 32578, 350928, 4254819, 57339343, 850210608, 13755324192, 241123857361, 4552433489355, 92097902228022, 1987543508858416, 45576279808372215, 1106640757105043895, 28364428977533987380, 765303225207132783360, 21681823874743612308981]

cp's OEIS Frontend

A222033 G.f.: Sum_{n>=0} Product_{k=1..n} (1 - 1/(1+k*x)^3).

Table of values

List of values