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.

A222920 Number of nX2 0..4 arrays with no three equal values in a row horizontally or vertically, and new values 0..4 introduced in row major order.

Table of values

n a(n)
1 2
2 15
3 174
4 3183
5 68076
6 1543538
7 35663142
8 829049736
9 19310392822
10 450063924406
11 10491666753024
12 244592254688694
13 5702297247404918
14 132941283209423448
15 3099351244544272614
16 72257348464516101894
17 1684586587434789765504

List of values

[2, 15, 174, 3183, 68076, 1543538, 35663142, 829049736, 19310392822, 450063924406, 10491666753024, 244592254688694, 5702297247404918, 132941283209423448, 3099351244544272614, 72257348464516101894, 1684586587434789765504]