cp's OEIS Frontend

A221936 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.

%I A221936 #6 Jul 23 2025 02:20:56
%S A221936 60,40608,17595404,8118923949,3719159201319,1705064784016177,
%T A221936 781631768770230485,358315975721236723937,164259260168423743838749,
%U A221936 75299755989611523426077650,34518925873564465982979613568
%N A221936 Number of nX6 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns.
%C A221936 Column 6 of A221937
%H A221936 R. H. Hardin, <a href="/A221936/b221936.txt">Table of n, a(n) for n = 1..31</a>
%e A221936 Some solutions for n=3
%e A221936 ..0..2..1..1..2..0....0..2..0..1..0..3....0..2..0..1..0..2....0..2..1..0..3..1
%e A221936 ..0..3..2..1..1..2....0..3..0..2..1..0....0..3..1..0..1..1....0..3..2..1..0..0
%e A221936 ..0..1..0..0..0..2....0..2..1..0..2..1....0..2..0..3..0..2....0..0..1..0..4..0
%K A221936 nonn
%O A221936 1,1
%A A221936 _R. H. Hardin_ Feb 01 2013