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.

A113040 Number of solutions to +-p(1)+-p(2)+-...+-p(2n)=1 where p(i) is the i-th prime.

Table of values

n a(n)
1 1
2 1
3 3
4 6
5 16
6 45
7 138
8 439
9 1417
10 4698
11 16021
12 55146
13 190274
14 671224
15 2404289
16 8535117
17 30635869
18 110496946
19 401422210
20 1467402238
21 5393176633
22 19883249002
23 73856531314
24 273602448261
25 1017563027699
26 3803902663467
27 14266523388813
28 53564969402478

List of values

[1, 1, 3, 6, 16, 45, 138, 439, 1417, 4698, 16021, 55146, 190274, 671224, 2404289, 8535117, 30635869, 110496946, 401422210, 1467402238, 5393176633, 19883249002, 73856531314, 273602448261, 1017563027699, 3803902663467, 14266523388813, 53564969402478]

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

Content is available under The OEIS End-User License Agreement.