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.

A252525 Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

Table of values

n a(n)
1 750
2 595
3 460
4 535
5 546
6 649
7 823
8 1036
9 1328
10 1756
11 2254
12 2949
13 3882
14 5007
15 6535
16 8608
17 11078
18 14439
19 18930
20 24343
21 31630
22 41368
23 53110
24 68859
25 89778
26 115127
27 148930
28 193720
29 248118
30 320379
31 415794
32 532023
33 685810
34 888376
35 1135670
36 1461819

List of values

[750, 595, 460, 535, 546, 649, 823, 1036, 1328, 1756, 2254, 2949, 3882, 5007, 6535, 8608, 11078, 14439, 18930, 24343, 31630, 41368, 53110, 68859, 89778, 115127, 148930, 193720, 248118, 320379, 415794, 532023, 685810, 888376, 1135670, 1461819]