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%I #6 Mar 09 2023 17:35:33
%S 5,49,117,572,4336,19750,102201,620508,3041449,16217839,93738044,
%T 476322405,2546428711,14301936049,74467601183,398781566199,
%U 2199927226366,11619003130461,62319679692416,340185096129345,1811374715345253
%N Number of n X 4 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.
%C Column 4 of A266131.
%H R. H. Hardin, <a href="/A266127/b266127.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..2..1..0..1....1..0..2..1....1..0..0..0....1..0..0..1....0..0..1..1
%e ..2..1..1..0....0..2..0..1....0..2..2..1....0..2..2..0....0..2..0..1
%e ..1..2..2..1....0..2..1..2....0..2..1..1....1..0..2..1....0..2..1..0
%e ..0..0..0..0....0..0..1..2....1..0..0..1....1..2..0..1....0..2..1..2
%Y Cf. A266131.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 21 2015
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