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.

A240415 Number of 4Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 25
2 139
3 1526
4 11670
5 74655
6 773196
7 5429095
8 41264901
9 368615027
10 2585037182
11 21489185687
12 174817614437
13 1291058701632
14 10769864002354
15 83962833112352
16 648485033420957
17 5301967970926934
18 40960040109260355
19 323977574986307633

List of values

[25, 139, 1526, 11670, 74655, 773196, 5429095, 41264901, 368615027, 2585037182, 21489185687, 174817614437, 1291058701632, 10769864002354, 83962833112352, 648485033420957, 5301967970926934, 40960040109260355, 323977574986307633]