A206290 - cp's OEIS frontend

A206290 G.f.: Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/(1 + x^k) ).

n	a(n)
0	1
1	1
2	2
3	3
4	5
5	7
6	12
7	17
8	29
9	44
10	77
11	114
12	218
13	330
14	617
15	987
16	1913
17	2968
18	6068
19	9500
20	19263
21	31399
22	64268
23	101702
24	218891
25	348559
26	735823
27	1205239
28	2576727
29	4119884
30	9100854
31	14588992
32	31841260
33	52163378
34	114485092
35	183947681
36	414704366
37	667453931
38	1487920000

[1, 1, 2, 3, 5, 7, 12, 17, 29, 44, 77, 114, 218, 330, 617, 987, 1913, 2968, 6068, 9500, 19263, 31399, 64268, 101702, 218891, 348559, 735823, 1205239, 2576727, 4119884, 9100854, 14588992, 31841260, 52163378, 114485092, 183947681, 414704366, 667453931, 1487920000]

cp's OEIS Frontend

A206290 G.f.: Sum_{n>=0} Product_{k=1..n} Series_Reversion( x/(1 + x^k) ).

Table of values

List of values