cp's OEIS Frontend

A233228 Number of nX6 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 A233228 #6 Jul 23 2025 07:57:03
%S A233228 452,616454,1142726121,2131764323784,3987381898274165,
%T A233228 7462045099033787721,13966565723905519312347,
%U A233228 26141937448057102691381982,48931705939631684079610274144,91589174857476172550555533830040
%N A233228 Number of nX6 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 A233228 Column 6 of A233230
%H A233228 R. H. Hardin, <a href="/A233228/b233228.txt">Table of n, a(n) for n = 1..210</a>
%e A233228 Some solutions for n=2
%e A233228 ..0..0..1..1..5..2....0..0..0..1..2..5....0..0..1..2..2..1....0..0..1..2..0..3
%e A233228 ..3..1..0..2..1..2....3..0..2..1..1..2....3..0..1..1..2..5....1..1..1..2..4..3
%K A233228 nonn
%O A233228 1,1
%A A233228 _R. H. Hardin_, Dec 06 2013