A207386 - cp's OEIS frontend

A207386 G.f.: Sum_{n>=0} Product_{k=1..n} (q^k - 1) where q = (1+x)/(1+x^3).

n	a(n)
0	1
1	1
2	2
3	6
4	28
5	172
6	1269
7	10879
8	106343
9	1167970
10	14241792
11	190919195
12	2790920003
13	44184957237
14	753152722642
15	13752229833566
16	267809474619299
17	5540559819166056
18	121355678158129804
19	2805498395990301867
20	68265999939081386947
21	1744058001878302097109

[1, 1, 2, 6, 28, 172, 1269, 10879, 106343, 1167970, 14241792, 190919195, 2790920003, 44184957237, 753152722642, 13752229833566, 267809474619299, 5540559819166056, 121355678158129804, 2805498395990301867, 68265999939081386947, 1744058001878302097109]

cp's OEIS Frontend

A207386 G.f.: Sum_{n>=0} Product_{k=1..n} (q^k - 1) where q = (1+x)/(1+x^3).

Table of values

List of values