Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
A252440
Number of (7+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 4 6 or 7.
Terms
- a(0) =2617a(1) =13139a(2) =59977a(3) =139425a(4) =920196a(5) =4567070a(6) =10924203a(7) =71981082a(8) =352414156a(9) =842846501a(10) =5554644436a(11) =27198728509a(12) =65131340122a(13) =429210735737
External references
- oeis: A252440