Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

A254015

Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

Terms

    a(0) =9560a(1) =23295a(2) =89310a(3) =313324a(4) =642050a(5) =1467412a(6) =3051110a(7) =6150750a(8) =12535008a(9) =24511673a(10) =47478906a(11) =91909111a(12) =176229414a(13) =338003157a(14) =647856048a(15) =1235057964a(16) =2357121456a(17) =4491480029a(18) =8545833444a(19) =16251001791a(20) =30861280586a(21) =58568037459

External references