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.

A240756 Number of n X 2 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or zero plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

Table of values

n a(n)
1 5
2 6
3 12
4 16
5 16
6 35
7 35
8 36
9 65
10 83
11 102
12 172
13 191
14 230
15 381
16 458
17 576
18 905
19 1064
20 1362
21 2090
22 2514
23 3267
24 4869
25 5894
26 7740
27 11297
28 13853
29 18318
30 26249
31 32499
32 43165
33 60950
34 76216
35 101501
36 141589
37 178559
38 238124
39 328924
40 418014
41 557746
42 764306
43 977771

List of values

[5, 6, 12, 16, 16, 35, 35, 36, 65, 83, 102, 172, 191, 230, 381, 458, 576, 905, 1064, 1362, 2090, 2514, 3267, 4869, 5894, 7740, 11297, 13853, 18318, 26249, 32499, 43165, 60950, 76216, 101501, 141589, 178559, 238124, 328924, 418014, 557746, 764306, 977771]