Number of (7+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
A252539
Number of (7+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 2 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 2 3 6 or 7.
Terms
- a(0) =823a(1) =1344a(2) =2332a(3) =3160a(4) =10720a(5) =18656a(6) =25280a(7) =85760a(8) =149248a(9) =202240a(10) =686080a(11) =1193984a(12) =1617920a(13) =5488640a(14) =9551872a(15) =12943360a(16) =43909120a(17) =76414976a(18) =103546880a(19) =351272960a(20) =611319808a(21) =828375040a(22) =2810183680a(23) =4890558464a(24) =6627000320a(25) =22481469440
External references
- oeis: A252539