Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300425

Number of nX6 0..1 arrays with every element equal to 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =307a(2) =7179a(3) =150352a(4) =3175101a(5) =67378450a(6) =1429216222a(7) =30305915964a(8) =642539662326

External references