cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A261062 Number of solutions to c(1)*prime(2) + ... + c(2n-1)*prime(2n) = -1, where c(i) = +-1 for i > 1, c(1) = 1.

Table of values

n a(n)
1 0
2 0
3 1
4 0
5 6
6 8
7 30
8 121
9 385
10 1102
11 4207
12 13263
13 48904
14 164298
15 610450
16 2108897
17 7592564
18 27444148
19 100851443
20 365507140
21 1344593522
22 4960584613
23 18435632285
24 68320148701
25 254166868115
26 951593812462
27 3568369245595
28 13386056545363
29 50416752718382

List of values

[0, 0, 1, 0, 6, 8, 30, 121, 385, 1102, 4207, 13263, 48904, 164298, 610450, 2108897, 7592564, 27444148, 100851443, 365507140, 1344593522, 4960584613, 18435632285, 68320148701, 254166868115, 951593812462, 3568369245595, 13386056545363, 50416752718382]