A220418 - cp's OEIS frontend

A220418 Express 1 - x - x^2 - x^3 - x^4 - ... as product (1 + g(1)x) (1 + g(2)x^2) (1 + g(3)x^3) ... and use a(n) = - g(n).

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	8
7	18
8	27
9	54
10	84
11	186
12	296
13	630
14	1008
15	2106
16	3711
17	7710
18	12924
19	27594
20	48528
21	97902
22	173352
23	364722
24	647504
25	1340622
26	2382660
27	4918482
28	9052392
29	18512790
30	33361776
31	69273666
32	127198287
33	258155910
34	475568220
35	981288906
36	1814542704
37	3714566310

[1, 1, 2, 3, 6, 8, 18, 27, 54, 84, 186, 296, 630, 1008, 2106, 3711, 7710, 12924, 27594, 48528, 97902, 173352, 364722, 647504, 1340622, 2382660, 4918482, 9052392, 18512790, 33361776, 69273666, 127198287, 258155910, 475568220, 981288906, 1814542704, 3714566310]

cp's OEIS Frontend

A220418 Express 1 - x - x^2 - x^3 - x^4 - ... as product (1 + g(1)x) (1 + g(2)x^2) (1 + g(3)x^3) ... and use a(n) = - g(n).

Table of values

List of values

cp's OEIS Frontend

A220418 Express 1 - x - x^2 - x^3 - x^4 - ... as product (1 + g(1)*x) * (1 + g(2)*x^2) *(1 + g(3)*x^3) * ... and use a(n) = - g(n).

Table of values

List of values

A220418 Express 1 - x - x^2 - x^3 - x^4 - ... as product (1 + g(1)x) (1 + g(2)x^2) (1 + g(3)x^3) ... and use a(n) = - g(n).