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 A237933 Number of (n+1)X(3+1) 0..3 arrays with the upper median plus the lower median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1

%I

%S 11701,228866,4554824,94068938,1903243716,38477471800,782578367787,

%T 16010421948796,325182956026994,6598288132312864,134297532801921910,

%U 2737952835801723408,55665392270619900732,1131238334494469739760

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

%C Column 3 of A237936

%H R. H. Hardin, <a href="/A237933/b237933.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 16 2014

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Last modified November 27 21:32 EST 2020. Contains 338684 sequences. (Running on oeis4.)