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.

A113041 Number of solutions to +-p(1)+-p(2)+-...+-p(2n-1) = 2, where p(i) is the i-th prime.

Table of values

n a(n)
1 1
2 0
3 1
4 3
5 9
6 27
7 78
8 249
9 782
10 2574
11 8676
12 29714
13 102162
14 356797
15 1268990
16 4521769
17 16134137
18 58061535
19 210499244
20 767154326
21 2809323733
22 10342098153
23 38281849044
24 142249547127
25 527095215036
26 1966843667482
27 7368829743507
28 27636276043171
29 103876045792060

List of values

[1, 0, 1, 3, 9, 27, 78, 249, 782, 2574, 8676, 29714, 102162, 356797, 1268990, 4521769, 16134137, 58061535, 210499244, 767154326, 2809323733, 10342098153, 38281849044, 142249547127, 527095215036, 1966843667482, 7368829743507, 27636276043171, 103876045792060]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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