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.

A240791 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or one 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 7
2 10
3 19
4 37
5 85
6 142
7 386
8 979
9 1988
10 5128
11 10616
12 25230
13 58238
14 125528
15 302384
16 670325
17 1520808
18 3524961
19 7865967
20 18151793
21 41320633
22 93575521
23 215154289
24 487353355
25 1112746546
26 2542170679
27 5772347607
28 13196888198
29 30049864101

List of values

[7, 10, 19, 37, 85, 142, 386, 979, 1988, 5128, 10616, 25230, 58238, 125528, 302384, 670325, 1520808, 3524961, 7865967, 18151793, 41320633, 93575521, 215154289, 487353355, 1112746546, 2542170679, 5772347607, 13196888198, 30049864101]