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Number of n X n array permutations with each element moving zero or one space horizontally or diagonally
0

%I #6 Dec 18 2015 18:17:38

%S 1,5,80,7300,2735828,4982424404,40668908306516,1544933702911323688,

%T 268632319882770483171376,215429706055786434110682479345,

%U 794334848116480290212387125594468856

%N Number of n X n array permutations with each element moving zero or one space horizontally or diagonally

%C Diagonal of A189449

%e Some solutions for 3X3

%e ..4..1..2....0..1..2....0..5..2....0..2..1....1..5..2....0..1..2....1..0..2

%e ..3..0..5....3..5..4....3..4..1....3..4..5....3..0..4....3..4..5....3..4..5

%e ..6..7..8....6..8..7....6..8..7....6..8..7....7..6..8....6..8..7....6..8..7

%K nonn

%O 1,2

%A _R. H. Hardin_ Apr 22 2011