A204855 - cp's OEIS frontend

A204855 G.f.: Sum_{n>=0} x^(n(n+1)/2) / Product_{k=1..n} (1 - (n-k+1)x^k).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	6
6	12
7	25
8	54
9	120
10	278
11	666
12	1671
13	4355
14	11804
15	33019
16	94960
17	279219
18	836907
19	2550991
20	7901818
21	24875931
22	79667065
23	259892494
24	864832484
25	2938862050
26	10204420451
27	36199678110
28	131086662067
29	483853193560
30	1817012289562
31	6927980565530

[1, 1, 1, 2, 3, 6, 12, 25, 54, 120, 278, 666, 1671, 4355, 11804, 33019, 94960, 279219, 836907, 2550991, 7901818, 24875931, 79667065, 259892494, 864832484, 2938862050, 10204420451, 36199678110, 131086662067, 483853193560, 1817012289562, 6927980565530]

cp's OEIS Frontend

A204855 G.f.: Sum_{n>=0} x^(n(n+1)/2) / Product_{k=1..n} (1 - (n-k+1)x^k).

Table of values

List of values

cp's OEIS Frontend

A204855 G.f.: Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1 - (n-k+1)*x^k).

Table of values

List of values

A204855 G.f.: Sum_{n>=0} x^(n(n+1)/2) / Product_{k=1..n} (1 - (n-k+1)x^k).