cp's OEIS Frontend

A237572 Number of (n+1)X(4+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.

%I A237572 #6 Jul 23 2025 10:19:07
%S A237572 103264,4146324,173478980,7415425124,313460630304,13253873415032,
%T A237572 561018557350096,23744013911896432,1004820307993854444,
%U A237572 42525851524551543744,1799676836916461964332,76161999586684517769192
%N A237572 Number of (n+1)X(4+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.
%C A237572 Column 4 of A237574
%H A237572 R. H. Hardin, <a href="/A237572/b237572.txt">Table of n, a(n) for n = 1..108</a>
%e A237572 Some solutions for n=1
%e A237572 ..3..1..0..3..1....2..2..0..1..3....1..1..3..2..1....0..3..0..0..2
%e A237572 ..1..3..0..0..2....0..0..1..1..2....2..0..0..2..0....2..1..1..1..1
%K A237572 nonn
%O A237572 1,1
%A A237572 _R. H. Hardin_, Feb 09 2014