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%I #8 Apr 16 2023 20:07:55
%S 1,3,20,464,30283,5897476,3394457868,5778059258273,29117129479453520,
%T 434446215594380010575
%N Number of n X n array permutations with each element not moving, or moving one space E, S or NW.
%C Diagonal of A189610.
%e Some solutions for 3 X 3
%e ..4..1..2....0..1..2....4..0..2....4..0..1....4..0..2....0..1..2....4..1..2
%e ..0..8..5....3..8..4....7..1..5....7..8..2....3..1..5....7..8..4....0..3..5
%e ..3..6..7....6..7..5....3..6..8....3..6..5....6..7..8....3..6..5....6..7..8
%Y Cf. A189610.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 24 2011
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