Number of (n+3)X(1+3) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.

A230789

Number of (n+3)X(1+3) 0..3 arrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero.

Terms

    a(0) =144a(1) =1024a(2) =23104a(3) =394384a(4) =5475600a(5) =84052224a(6) =1326125056a(7) =20301690256a(8) =310824090256

External references