A237918 - OEIS

%I #4 Feb 15 2014 17:27:49

%S 63476,1282504,27873820,636891488,14163256928,319272033708,

%T 7170378195892,161382511774196,3629106051378200,81717484559463064,

%U 1838421822041726832,41385101785859636936,931379102458488697656,20967387870826434629524

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

%C Column 4 of A237921

%H R. H. Hardin, <a href="/A237918/b237918.txt">Table of n, a(n) for n = 1..100</a>

%e Some solutions for n=1

%e ..3..1..3..1..2....0..1..1..2..2....3..1..1..0..0....1..2..1..2..1

%e ..2..1..1..2..2....2..0..2..1..2....1..2..0..3..0....3..1..0..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 15 2014