Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero.

A303956

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =5a(2) =11a(3) =22a(4) =49a(5) =119a(6) =287a(7) =664a(8) =1563a(9) =3716a(10) =8788a(11) =20753a(12) =49077a(13) =116121a(14) =274644a(15) =649499a(16) =1536206a(17) =3633554a(18) =8594035a(19) =20326437a(20) =48076235a(21) =113710340a(22) =268947851a(23) =636115892a(24) =1504543784a(25) =3558552569a(26) =8416699677a(27) =19907205269a(28) =47084589648

External references