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 A252399 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7 0

%I #4 Dec 17 2014 09:50:40

%S 458,442,1515,6231,73925,1068295,8765249,335814585,13694498100,

%T 187357176355,23527700483260,2773482863248050,59943048895785363,

%U 25273086428741548965,8681532608051019527627,286961563672031753409771

%N Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7

%C Diagonal of A252407

%e Some solutions for n=4

%e ..0..2..2..3..2..2....3..2..2..3..2..2....3..3..1..0..3..1....3..2..2..0..2..2

%e ..3..1..3..3..1..3....3..1..3..3..1..3....3..2..2..3..2..2....2..3..2..2..3..2

%e ..2..2..3..2..2..0....2..2..3..2..2..3....2..3..2..2..3..2....0..3..1..3..0..1

%e ..3..2..2..0..2..2....3..2..2..0..2..2....3..0..1..3..3..1....3..2..2..3..2..2

%e ..0..1..3..3..1..3....3..1..3..3..1..3....3..2..2..0..2..2....2..0..2..2..3..2

%e ..2..2..3..2..2..3....2..2..0..2..2..3....2..3..2..2..3..2....3..3..1..3..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2014

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Last modified June 3 23:57 EDT 2023. Contains 363118 sequences. (Running on oeis4.)