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

A252526

Number of (n+2) X (2+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) =730a(1) =337a(2) =334a(3) =426a(4) =676a(5) =964a(6) =1344a(7) =2312a(8) =3336a(9) =4800a(10) =8464a(11) =12304a(12) =18048a(13) =32288a(14) =47136a(15) =69888a(16) =126016a(17) =184384a(18) =274944a(19) =497792a(20) =729216a(21) =1090560a(22) =1978624a(23) =2900224a(24) =4343808a(25) =7889408a(26) =11567616a(27) =17338368a(28) =31507456a(29) =46203904

External references