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A256802 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1 0

%I #4 Apr 10 2015 13:28:24

%S 32,312,5891,187203,10791281,1138136868,215464267564,73460897153458,

%T 45244446929195903,50270946310754652511,100729046029931700116928,

%U 364111018909574379029951571,2374431276261700527941601475769

%N Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 and no antidiagonal sum 0 and no row sum 0 or 1 and no column sum 0 or 1

%C Diagonal of A256810

%e Some solutions for n=4

%e ..0..1..1..1..1..1....1..1..1..0..1..1....1..0..1..1..0..1....0..1..1..1..1..0

%e ..1..1..1..1..0..1....1..1..1..1..1..1....1..1..1..0..1..1....1..1..0..1..1..1

%e ..1..1..1..1..1..1....1..1..1..1..0..1....0..1..1..1..1..1....1..0..1..1..0..1

%e ..0..1..1..1..1..1....0..1..1..1..1..0....1..1..1..1..1..1....1..1..1..0..1..1

%e ..1..1..1..0..1..1....1..1..0..1..1..1....1..0..1..1..1..0....0..1..1..1..1..1

%e ..1..0..1..1..1..1....1..0..1..1..1..1....1..1..1..1..0..1....1..1..1..1..0..1

%Y Cf. A256810

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 10 2015

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Last modified April 23 11:35 EDT 2024. Contains 371912 sequences. (Running on oeis4.)