Number of (n+2)X7 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

A184570

Number of (n+2)X7 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Terms

    a(0) =9496395a(1) =179122657a(2) =2113138210a(3) =18803004899a(4) =136680720320a(5) =848542379467

External references