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.

A223039 Number of nX4 0..3 arrays with no more than floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

n a(n)
1 11
2 1265
3 229437
4 42964721
5 8206670940
6 1590576924149
7 311543161837482
8 61504928367575855
9 12217149892788877445
10 2438751075983097268086
11 488783777099597628446445
12 98294363180577784998680559

List of values

[11, 1265, 229437, 42964721, 8206670940, 1590576924149, 311543161837482, 61504928367575855, 12217149892788877445, 2438751075983097268086, 488783777099597628446445, 98294363180577784998680559]