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%I #6 Nov 10 2015 12:11:56
%S 3,35,2076,489294,529329240,2543460828164,55588636099730695,
%T 5525569263450576586033
%N Number of (n+1)X(n+1) arrays of permutations of 0..(n+1)^2-1 filled by rows with each element moved a city block distance of 0 or 1.
%C Diagonal of A263519.
%e Some solutions for n=3
%e ..0..1..3..7....0..1..6..7....0..1..6..7....0..1..2..3....0..1..3..7
%e ..8..4..2..6....5..4..2..3....4..5..2..3....4..6..5..7....4..5..2..6
%e .12..5.11.10....8.13.14.10....8..9.10.11....9..8.11.10....9..8.11.10
%e .13..9.14.15...12..9.15.11...12.13.14.15...13.12.15.14...13.12.14.15
%Y Cf. A263519.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 19 2015