Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

A304137

Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 6 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =13a(2) =9a(3) =11a(4) =20a(5) =17a(6) =25a(7) =62a(8) =59a(9) =93a(10) =220a(11) =237a(12) =381a(13) =830a(14) =991a(15) =1601a(16) =3236a(17) =4185a(18) =6769a(19) =12894a(20) =17715a(21) =28661a(22) =52204a(23) =75029a(24) =121397a(25) =213918a(26) =317815a(27) =514233a(28) =884532a(29) =1346273

External references