Number of n X 4 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

A230180

Number of n X 4 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j).

Terms

    a(0) =9a(1) =159a(2) =3411a(3) =73857a(4) =1603431a(5) =34825803a(6) =756450105a(7) =16430979183a(8) =356900507139

External references