Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
A252011
Number of (n+2) X (4+2) 0..3 arrays with every 3 X 3 subblock row and column sum 1 3 6 or 8 and every diagonal and antidiagonal sum not 1 3 6 or 8.
Terms
- a(0) =1618a(1) =2002a(2) =2170a(3) =3814a(4) =8482a(5) =16994a(6) =29954a(7) =67714a(8) =136002a(9) =239874a(10) =541762a(11) =1088002a(12) =1918978a(13) =4334082a(14) =8704002a(15) =15351810a(16) =34672642a(17) =69632002a(18) =122814466a(19) =277381122a(20) =557056002a(21) =982515714a(22) =2219048962a(23) =4456448002a(24) =7860125698a(25) =17752391682
External references
- oeis: A252011