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.

A281760 Number of n X 3 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Table of values

n a(n)
1 2
2 14
3 47
4 90
5 201
6 374
7 672
8 1172
9 2015
10 3442
11 5859
12 9952
13 16876
14 28574
15 48309
16 81554
17 137477
18 231418
19 389016
20 653080
21 1095019
22 1833842
23 3067719
24 5126372
25 8557988
26 14273314
27 23784417
28 39600082
29 65880265
30 109518782
31 181933584
32 302025692

List of values

[2, 14, 47, 90, 201, 374, 672, 1172, 2015, 3442, 5859, 9952, 16876, 28574, 48309, 81554, 137477, 231418, 389016, 653080, 1095019, 1833842, 3067719, 5126372, 8557988, 14273314, 23784417, 39600082, 65880265, 109518782, 181933584, 302025692]