Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
A257420
Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.
Terms
- a(0) =2616a(1) =7652a(2) =30309a(3) =119393a(4) =403951a(5) =1293242a(6) =4098078a(7) =12497488a(8) =37528750a(9) =111339861a(10) =326552920a(11) =949466125a(12) =2746182574a(13) =7900552664a(14) =22633690594a(15) =64617935573a(16) =183950154022a(17) =522353720305
External references
- oeis: A257420