A290973 - cp's OEIS frontend

A290973 Write 2*x/(1-x) in the form Sum_{j>=1} ((1-x^j)^a(j) - 1).

n	a(n)
1	-2
2	1
3	2
4	3
5	4
6	6
7	6
8	10
9	8
10	15
11	10
12	25
13	12
14	28
15	10
16	60
17	16
18	25
19	18
20	125
21	0
22	66
23	22
24	218
25	24
26	91
27	-30
28	420
29	28
30	-387
31	30
32	2011
33	-88
34	153
35	28
36	-1894
37	36
38	190
39	-182
40	8902
41	40
42	-3234
43	42
44	2398
45	-132
46	276
47	46
48	2340
49	48
50	-2678
51	-510
52	4641
53	52
54	-1754
55	-198
56	108400

[-2, 1, 2, 3, 4, 6, 6, 10, 8, 15, 10, 25, 12, 28, 10, 60, 16, 25, 18, 125, 0, 66, 22, 218, 24, 91, -30, 420, 28, -387, 30, 2011, -88, 153, 28, -1894, 36, 190, -182, 8902, 40, -3234, 42, 2398, -132, 276, 46, 2340, 48, -2678, -510, 4641, 52, -1754, -198, 108400]

cp's OEIS Frontend

A290973 Write 2*x/(1-x) in the form Sum_{j>=1} ((1-x^j)^a(j) - 1).

Table of values

List of values