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%I #4 Oct 16 2015 11:26:04
%S 36,17376,2205225,188020096,24782315776,3447945608640,431369679452481,
%T 52701991071361200,6659057448461741764,847742465861422866576,
%U 106792577897071860541969,13418361811042157528624000
%N Number of (n+1)X(4+1) arrays of permutations of 0..n*4-1 with each element moved a city block distance of exactly 2.
%C Column 4 of A263389.
%H R. H. Hardin, <a href="/A263388/b263388.txt">Table of n, a(n) for n = 1..13</a>
%e Some solutions for n=2
%e .10..7.12..1.14...10.11..8..9.14....2..3..0..9..8...10..5.12..9..8
%e .11..8..3..2.13....1..0..5..6..3....7.10..5.12.13...11..2..1.14.13
%e ..0..5..6..9..4...12.13..2..7..4....6..1.14.11..4....0..7..6..3..4
%Y Cf. A263389.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 16 2015
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