Number of (n+2)X(3+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 4.
A251677
Number of (n+2)X(3+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 4.
Terms
- a(0) =953a(1) =2089a(2) =5527a(3) =16467a(4) =54523a(5) =184139a(6) =632811a(7) =2196747a(8) =7647815a(9) =26675183a(10) =93098207a(11) =325011115a(12) =1135034003a(13) =3964108395a(14) =13844422191a(15) =48352496787a(16) =168877391803a(17) =589827645215
External references
- oeis: A251677