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Number of n X n array permutations with every element making zero or one right-handed knight moves (out 2, right 1)
0

%I #6 Dec 18 2015 18:18:04

%S 1,1,16,729,103680,92160000,366400000000,6638067426640896

%N Number of n X n array permutations with every element making zero or one right-handed knight moves (out 2, right 1)

%C Diagonal of A209543

%e Some solutions for n=4

%e ..6..8..2..3....6..8..2..3....0..7..2..3....6..7..2..3....0..8..2.10

%e ..4.11..0.14....4..5..0.14...10.12..6..1...10..5..0.14....4.12.13..1

%e ..1..9.10..5....1..9.10.11...14..9..4.11....1.15..4.11...14..9..3.11

%e .12.13..7.15...12.13..7.15....5.13..8.15...12.13..8..9....5..6..7.15

%K nonn

%O 1,3

%A _R. H. Hardin_ Mar 10 2012