Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
A252608
Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =614a(1) =725a(2) =1042a(3) =1635a(4) =3022a(5) =5503a(6) =9927a(7) =19165a(8) =36457a(9) =66942a(10) =130253a(11) =250493a(12) =461838a(13) =901547a(14) =1740381a(15) =3212610a(16) =6279191a(17) =12136529a(18) =22411460a(19) =43823953a(20) =84734165a(21) =156496838a(22) =306070623a(23) =591832623a(24) =1093177438a(25) =2138153485a(26) =4134310387
External references
- oeis: A252608