Number of (2+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.
A252534
Number of (2+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) =595a(1) =337a(2) =341a(3) =462a(4) =706a(5) =1000a(6) =1468a(7) =2420a(8) =3480a(9) =5240a(10) =8872a(11) =12880a(12) =19696a(13) =33872a(14) =49440a(15) =76256a(16) =132256a(17) =193600a(18) =299968a(19) =522560a(20) =766080a(21) =1189760a(22) =2077312a(23) =3047680a(24) =4738816a(25) =8283392a(26) =12157440a(27) =18914816a(28) =33081856a(29) =48563200
External references
- oeis: A252534