Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 7.
A252376
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 7.
Terms
- a(0) =578a(1) =555a(2) =632a(3) =744a(4) =1305a(5) =2356a(6) =3495a(7) =6665a(8) =13006a(9) =20114a(10) =40514a(11) =81962a(12) =128415a(13) =264951a(14) =543931a(15) =856087a(16) =1783465
External references
- oeis: A252376