A151676 - cp's OEIS frontend

A151676 Let c(n) = x^(2^n-1)*(1-x^(2^n)), g(n) = 1 + x^(2^n-1) + x^(2^n), h(n) = Product_{i=1..n} g(i); then use g.f. Sum_{n>=1} c(n)/h(n).

n	a(n)
0	0
1	1
2	-1
3	0
4	1
5	-1
6	-1
7	1
8	0
9	0
10	2
11	-1
12	-2
13	0
14	-2
15	1
16	5
17	1
18	-1
19	-3
20	-7
21	-1
22	8
23	8
24	6
25	-3
26	-18
27	-16
28	0
29	17
30	31
31	21
32	-19
33	-51
34	-47
35	-3
36	70
37	106
38	48
39	-71
40	-170
41	-156
42	18
43	243
44	318
45	132
46	-253
47	-564
48	-455
49	130
50	819
51	1024
52	341
53	-952
54	-1849
55	-1355
56	606
57	2789
58	3199
59	727
60	-3410
61	-5979
62	-3932
63	2678
64	9408
65	9926
66	1281
67	-12047

[0, 1, -1, 0, 1, -1, -1, 1, 0, 0, 2, -1, -2, 0, -2, 1, 5, 1, -1, -3, -7, -1, 8, 8, 6, -3, -18, -16, 0, 17, 31, 21, -19, -51, -47, -3, 70, 106, 48, -71, -170, -156, 18, 243, 318, 132, -253, -564, -455, 130, 819, 1024, 341, -952, -1849, -1355, 606, 2789, 3199, 727, -3410, -5979, -3932, 2678, 9408, 9926, 1281, -12047]

cp's OEIS Frontend

A151676 Let c(n) = x^(2^n-1)*(1-x^(2^n)), g(n) = 1 + x^(2^n-1) + x^(2^n), h(n) = Product_{i=1..n} g(i); then use g.f. Sum_{n>=1} c(n)/h(n).

Table of values

List of values