Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
A252609
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.
Terms
- a(0) =1051a(1) =1379a(2) =2817a(3) =5304a(4) =14435a(5) =37917a(6) =75859a(7) =213611a(8) =599753a(9) =1195427a(10) =3451701a(11) =10095479a(12) =19984819a(13) =58655670a(14) =176140167a(15) =346827424a(16) =1029346845a(17) =3144314768a(18) =6169315363a(19) =18442681353a(20) =56943954915a(21) =111477238107a(22) =334759247526
External references
- oeis: A252609