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.

A261212 Maximum number of 1's in an fully symmetrical n X n binary matrix with no three 1's adjacent in a line along a row, column or diagonally.

Table of values

n a(n)
1 1
2 4
3 4
4 8
5 16
6 20
7 25
8 36
9 41
10 48
11 64
12 72
13 81
14 100
15 109
16 120
17 144
18 156
19 173
20 196
21 213
22 228
23 256
24 272
25 300
26 324
27 349
28 368
29 401
30 424
31 457
32 484

List of values

[1, 4, 4, 8, 16, 20, 25, 36, 41, 48, 64, 72, 81, 100, 109, 120, 144, 156, 173, 196, 213, 228, 256, 272, 300, 324, 349, 368, 401, 424, 457, 484]