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.

A063867 Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0 or +- 1.

Table of values

n a(n)
0 1
1 2
2 2
3 2
4 2
5 6
6 10
7 8
8 14
9 46
10 80
11 70
12 124
13 442
14 794
15 722
16 1314
17 4820
18 8882
19 8220
20 15272
21 56920
22 106444
23 99820
24 187692
25 707486
26 1336546
27 1265204
28 2399784
29 9119656
30 17358560
31 16547220
32 31592878
33 120801376
34 231266520
35 221653776

List of values

[1, 2, 2, 2, 2, 6, 10, 8, 14, 46, 80, 70, 124, 442, 794, 722, 1314, 4820, 8882, 8220, 15272, 56920, 106444, 99820, 187692, 707486, 1336546, 1265204, 2399784, 9119656, 17358560, 16547220, 31592878, 120801376, 231266520, 221653776]