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.

A240628 Number of n X 5 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.

This page as a plain text file.
%I A240628 #9 Feb 01 2025 23:19:28
%S A240628 40,16624,7462748,3367163455,1519699081714,685854075788477,
%T A240628 309535605539765299,139697630796640339536,63047448929964784303613,
%U A240628 28454174772679454861874697,12841757682871155282688313826,5795660627332850278874835069098,2615660794724892372200960575345057
%N A240628 Number of n X 5 0..3 arrays with no element equal to exactly two horizontal and vertical neighbors, with new values 0..3 introduced in row major order.
%H A240628 R. H. Hardin, <a href="/A240628/b240628.txt">Table of n, a(n) for n = 1..25</a>
%e A240628 Some solutions for n=2:
%e A240628 ..0..1..2..1..1....0..1..2..1..2....0..1..0..2..0....0..0..1..0..2
%e A240628 ..0..1..2..0..3....3..1..0..2..1....2..2..0..1..3....3..2..3..3..2
%Y A240628 Column 5 of A240629.
%K A240628 nonn
%O A240628 1,1
%A A240628 _R. H. Hardin_, Apr 09 2014