Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

A297902

Number of nX3 0..1 arrays with every element equal to 0, 1, 3 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =3a(1) =3a(2) =1a(3) =4a(4) =5a(5) =5a(6) =20a(7) =29a(8) =63a(9) =156a(10) =311a(11) =691a(12) =1568a(13) =3387a(14) =7489a(15) =16676a(16) =36645a(17) =80981a(18) =179356a(19) =395789a(20) =874655a(21) =1934164a(22) =4272847a(23) =9442819a(24) =20872192a(25) =46122963a(26) =101931201a(27) =225279044a(28) =497854821a(29) =1100259109

External references