A240628 - OEIS

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.

%I #9 Feb 01 2025 23:19:28

%S 40,16624,7462748,3367163455,1519699081714,685854075788477,

%T 309535605539765299,139697630796640339536,63047448929964784303613,

%U 28454174772679454861874697,12841757682871155282688313826,5795660627332850278874835069098,2615660794724892372200960575345057

%N 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 R. H. Hardin, <a href="/A240628/b240628.txt">Table of n, a(n) for n = 1..25</a>

%e Some solutions for n=2:

%e ..0..1..2..1..1....0..1..2..1..2....0..1..0..2..0....0..0..1..0..2

%e ..0..1..2..0..3....3..1..0..2..1....2..2..0..1..3....3..2..3..3..2

%Y Column 5 of A240629.

%K nonn,changed

%O 1,1

%A _R. H. Hardin_, Apr 09 2014