T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing sum of every three consecutive values in every row and column.

A250601

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with nondecreasing sum of every three consecutive values in every row and column.

Terms

    a(0) =19683a(1) =157464a(2) =157464a(3) =1259712a(4) =2099520a(5) =1259712a(6) =10077696a(7) =27993600a(8) =27993600a(9) =10077696a(10) =46656000a(11) =373248000a(12) =622080000a(13) =373248000a(14) =46656000a(15) =216000000a(16) =2592000000a(17) =13824000000a(18) =13824000000a(19) =2592000000a(20) =216000000a(21) =1000000000

External references