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.

A239990 Number of 6Xn 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 or one plus the sum of the elements diagonally to its northwest, modulo 4.

Table of values

n a(n)
1 10
2 84
3 935
4 9079
5 83658
6 652346
7 4803152
8 33097266
9 216706121
10 1349071998
11 8021288399
12 45621294425
13 248975151409
14 1305176292249
15 6573063784889
16 31800829162681
17 147862529519971
18 661287427073134
19 2848137371338660

List of values

[10, 84, 935, 9079, 83658, 652346, 4803152, 33097266, 216706121, 1349071998, 8021288399, 45621294425, 248975151409, 1305176292249, 6573063784889, 31800829162681, 147862529519971, 661287427073134, 2848137371338660]