Number of (n+2) X (4+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.

A252528

Number of (n+2) X (4+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) =719a(1) =462a(2) =626a(3) =790a(4) =1676a(5) =2504a(6) =3160a(7) =6704a(8) =10016a(9) =12640a(10) =26816a(11) =40064a(12) =50560a(13) =107264a(14) =160256a(15) =202240a(16) =429056a(17) =641024a(18) =808960a(19) =1716224a(20) =2564096a(21) =3235840a(22) =6864896a(23) =10256384a(24) =12943360a(25) =27459584a(26) =41025536a(27) =51773440a(28) =109838336

External references