Number of (4+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.

A252536

Number of (4+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) =535a(1) =426a(2) =610a(3) =790a(4) =1592a(5) =2440a(6) =3160a(7) =6368a(8) =9760a(9) =12640a(10) =25472a(11) =39040a(12) =50560a(13) =101888a(14) =156160a(15) =202240a(16) =407552a(17) =624640a(18) =808960a(19) =1630208a(20) =2498560a(21) =3235840a(22) =6520832a(23) =9994240a(24) =12943360a(25) =26083328a(26) =39976960a(27) =51773440a(28) =104333312a(29) =159907840

External references