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.

A239649 T(n,k)=Number of nXk 0..3 arrays with no element equal to zero plus the sum of elements to its left or two plus the sum of the elements above it, modulo 4.

Table of values

n a(n)
1 2
2 4
3 4
4 8
5 20
6 10
7 16
8 92
9 112
10 22
11 32
12 418
13 1182
14 560
15 50
16 64
17 1898
18 12246
19 13476
20 2874
21 114
22 128
23 8588
24 127454
25 320314
26 158728
27 14788
28 258
29 256
30 38888
31 1320102
32 7629186
33 8634040
34 1864886
35 75540
36 586
37 512
38 175974
39 13703468
40 181039448
41 471203608

List of values

[2, 4, 4, 8, 20, 10, 16, 92, 112, 22, 32, 418, 1182, 560, 50, 64, 1898, 12246, 13476, 2874, 114, 128, 8588, 127454, 320314, 158728, 14788, 258, 256, 38888, 1320102, 7629186, 8634040, 1864886, 75540, 586, 512, 175974, 13703468, 181039448, 471203608]