Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

A303238

Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =13a(2) =8a(3) =10a(4) =61a(5) =160a(6) =458a(7) =1748a(8) =6056a(9) =20975a(10) =76565a(11) =277934a(12) =1007900a(13) =3682461a(14) =13473650a(15) =49327443a(16) =180826119a(17) =663368564a(18) =2434697476a(19) =8939173919a(20) =32829758366a(21) =120594251282a(22) =443046818432

External references