Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
A252467
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =716a(1) =682a(2) =813a(3) =1463a(4) =3497a(5) =9056a(6) =24331a(7) =66366a(8) =182232a(9) =501727a(10) =1381625a(11) =3805197a(12) =10482896a(13) =28880351a(14) =79562832a(15) =219191402a(16) =603866771a(17) =1663632701a(18) =4583248473a(19) =12626699802a(20) =34786145839a(21) =95834674648a(22) =264021358176a(23) =727370136753
External references
- oeis: A252467