Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

A317379

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =8a(1) =9a(2) =36a(3) =123a(4) =414a(5) =1580a(6) =5704a(7) =20162a(8) =72715a(9) =262549a(10) =944628a(11) =3399508a(12) =12242821a(13) =44087164a(14) =158739670a(15) =571576721a(16) =2058142185a(17) =7410913041a(18) =26684956759a(19) =96086522975a(20) =345986123562

External references