cp's OEIS Frontend

A233227 Number of nX5 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

%I A233227 #6 Jul 23 2025 07:56:57
%S A233227 99,39203,21895530,12389989684,7027777888700,3987381898274165,
%T A233227 2262465262533395122,1283750879072515499846,728417859359640269016202,
%U A233227 413314485961750753937325815,234520446849081354380794520582
%N A233227 Number of nX5 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.
%C A233227 Column 5 of A233230
%H A233227 R. H. Hardin, <a href="/A233227/b233227.txt">Table of n, a(n) for n = 1..210</a>
%e A233227 Some solutions for n=2
%e A233227 ..0..1..0..1..1....0..1..1..2..1....0..0..1..1..2....0..1..5..1..2
%e A233227 ..1..2..2..1..5....1..1..2..1..5....1..3..0..1..2....0..1..2..1..5
%K A233227 nonn
%O A233227 1,1
%A A233227 _R. H. Hardin_, Dec 06 2013