A215222 - cp's OEIS frontend

A215222 Number of solutions to n = Sum_{i=1..pi(n-1)} c(i)*p(i) with c(i) in {-1,0,1}, p(n) = n-th prime and pi = A000720.

n	a(n)
1	0
2	0
3	0
4	0
5	1
6	1
7	1
8	2
9	2
10	3
11	1
12	5
13	5
14	13
15	12
16	11
17	11
18	29
19	28
20	74
21	73
22	71
23	69
24	184
25	182
26	176
27	173
28	170
29	164
30	446
31	437
32	1180
33	1165
34	1147
35	1137
36	1115
37	1104
38	2984
39	2949
40	2919
41	2887
42	7841
43	7778
44	21331
45	21184
46	21029
47	20861
48	57465
49	57114
50	56741
51	56372
52	55997
53	55610

[0, 0, 0, 0, 1, 1, 1, 2, 2, 3, 1, 5, 5, 13, 12, 11, 11, 29, 28, 74, 73, 71, 69, 184, 182, 176, 173, 170, 164, 446, 437, 1180, 1165, 1147, 1137, 1115, 1104, 2984, 2949, 2919, 2887, 7841, 7778, 21331, 21184, 21029, 20861, 57465, 57114, 56741, 56372, 55997, 55610]

cp's OEIS Frontend

A215222 Number of solutions to n = Sum_{i=1..pi(n-1)} c(i)*p(i) with c(i) in {-1,0,1}, p(n) = n-th prime and pi = A000720.

Table of values

List of values