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A241251 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.

%I A241251 #6 Jun 02 2025 10:02:03
%S A241251 7,10,34,120,545,2570,13328,70264,390840,2166393,12186519,68347761,
%T A241251 385756287,2171706653,12264859070,69159861508,390555507284,
%U A241251 2203677274384,12443050758381,70227871631917,396507191404589,2238145931844904
%N A241251 Number of nX4 0..3 arrays with no element equal to one plus the sum of elements to its left or zero plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or zero plus the sum of the elements antidiagonally to its northeast, modulo 4.
%C A241251 Column 4 of A241255
%H A241251 R. H. Hardin, <a href="/A241251/b241251.txt">Table of n, a(n) for n = 1..210</a>
%e A241251 Some solutions for n=4
%e A241251 ..3..3..2..2....3..3..2..2....3..3..2..2....3..3..2..3....2..2..3..3
%e A241251 ..2..1..3..1....2..1..3..1....2..1..3..1....2..1..1..2....0..0..2..1
%e A241251 ..2..2..2..1....2..2..3..1....0..2..0..1....2..2..0..2....0..0..0..2
%e A241251 ..2..1..2..1....2..1..3..2....0..3..2..3....0..0..0..2....3..3..0..1
%K A241251 nonn
%O A241251 1,1
%A A241251 _R. H. Hardin_, Apr 18 2014