T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

A184574

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Terms

    a(0) =14178a(1) =102445a(2) =102445a(3) =545662a(4) =993538a(5) =545662a(6) =2430950a(7) =6803631a(8) =6803631a(9) =2430950a(10) =9496395a(11) =37767705a(12) =57374460a(13) =37767705a(14) =9496395a(15) =33351260a(16) =179122657a(17) =380532059a(18) =380532059a(19) =179122657a(20) =33351260a(21) =107058241a(22) =748499580a(23) =2113138210

External references