Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
A251901
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5.
Terms
- a(0) =5264a(1) =1962a(2) =2772a(3) =4208a(4) =10266a(5) =17976a(6) =28288a(7) =66216a(8) =121684a(9) =210948a(10) =502782a(11) =957268a(12) =1775466a(13) =4040932a(14) =8403774a(15) =16389916a(16) =36469244a(17) =76274736a(18) =161027262a(19) =348138252a(20) =747214432a(21) =1575745364a(22) =3498942344a(23) =7430457700a(24) =16117264814a(25) =34861132976
External references
- oeis: A251901