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.

A303042 Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 8
2 10
3 35
4 74
5 234
6 869
7 2926
8 8500
9 27931
10 96592
11 325288
12 1051261
13 3506796
14 11931140
15 40248675
16 134258666
17 451774036
18 1530339997
19 5170509004
20 17416735952
21 58815737695
22 199037081262
23 673067713068
24 2274228205231
25 7690132113108

List of values

[8, 10, 35, 74, 234, 869, 2926, 8500, 27931, 96592, 325288, 1051261, 3506796, 11931140, 40248675, 134258666, 451774036, 1530339997, 5170509004, 17416735952, 58815737695, 199037081262, 673067713068, 2274228205231, 7690132113108]