A206139 - cp's OEIS frontend

A206139 G.f.: A(x) = Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1-x^k)^(n-k+1).

n	a(n)
0	1
1	1
2	1
3	2
4	3
5	5
6	8
7	13
8	21
9	34
10	55
11	88
12	141
13	224
14	356
15	563
16	890
17	1401
18	2202
19	3448
20	5386
21	8386
22	13025
23	20175
24	31180
25	48077
26	73976
27	113588
28	174057
29	266174
30	406224
31	618729
32	940552
33	1427038
34	2161122
35	3266956
36	4930052
37	7427314
38	11171332
39	16776169
40	25154204

[1, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 88, 141, 224, 356, 563, 890, 1401, 2202, 3448, 5386, 8386, 13025, 20175, 31180, 48077, 73976, 113588, 174057, 266174, 406224, 618729, 940552, 1427038, 2161122, 3266956, 4930052, 7427314, 11171332, 16776169, 25154204]

cp's OEIS Frontend

A206139 G.f.: A(x) = Sum_{n>=0} x^(n*(n+1)/2) / Product_{k=1..n} (1-x^k)^(n-k+1).

Table of values

List of values