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.

A252537 Number of (5+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.

Table of values

n a(n)
1 546
2 676
3 1114
4 1676
5 4420
6 7184
7 11456
8 31136
9 50560
10 83840
11 232192
12 376832
13 639488
14 1789952
15 2904064
16 4990976
17 14049280
18 22790144
19 39428096
20 111312896
21 180551680
22 313425920
23 886177792
24 1437335552
25 2499411968
26 7072120832

List of values

[546, 676, 1114, 1676, 4420, 7184, 11456, 31136, 50560, 83840, 232192, 376832, 639488, 1789952, 2904064, 4990976, 14049280, 22790144, 39428096, 111312896, 180551680, 313425920, 886177792, 1437335552, 2499411968, 7072120832]