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.

A222576 Number of 4Xn 0..2 arrays with no more than floor(4Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Table of values

n a(n)
1 14
2 18
3 120
4 435
5 3516
6 25441
7 212957
8 1933819
9 17971162
10 172292518
11 1649722196
12 15907967878
13 153952727468
14 1485280127413
15 14446587454682
16 139301828808661
17 1359137046700841

List of values

[14, 18, 120, 435, 3516, 25441, 212957, 1933819, 17971162, 172292518, 1649722196, 15907967878, 153952727468, 1485280127413, 14446587454682, 139301828808661, 1359137046700841]