Number of (n+2)X(2+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.
A256804
Number of (n+2)X(2+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.
Terms
- a(0) =86a(1) =312a(2) =1167a(3) =4219a(4) =15291a(5) =55798a(6) =203129a(7) =738760a(8) =2689072a(9) =9788263a(10) =35621557a(11) =129642381a(12) =471844124a(13) =1717266695a(14) =6249942014a(15) =22746670844a(16) =82786372499a(17) =301300009747
External references
- oeis: A256804