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.

A252533 Number of (1+2)X(n+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
2 730
3 621
4 719
5 778
6 932
7 1200
8 1498
9 1968
10 2708
11 3473
12 4698
13 6444
14 8494
15 11435
16 15560
17 20630
18 27462
19 36761
20 48910
21 64407
22 85224
23 113390
24 148048
25 193940
26 258080
27 334681
28 435134
29 578923
30 746716
31 964795
32 1283490
33 1648229
34 2118894
35 2818420

List of values

[750, 730, 621, 719, 778, 932, 1200, 1498, 1968, 2708, 3473, 4698, 6444, 8494, 11435, 15560, 20630, 27462, 36761, 48910, 64407, 85224, 113390, 148048, 193940, 258080, 334681, 435134, 578923, 746716, 964795, 1283490, 1648229, 2118894, 2818420]