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A256021 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 0 or 1 and no antidiagonal sum 0 or 1 and no row sum 1 and no column sum 1 0

%I #4 Mar 13 2015 13:45:28

%S 33,164,1689,23134,494704,17064206,904174706,74064844601,

%T 9413114643755,1840791210516272,554265737552127281,

%U 257592212385874955248,184567323274511744214582,203714031594496792956553885

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

%C Diagonal of A256029

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A256029

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 13 2015

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Last modified March 29 05:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)