Number of 4Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303515
Number of 4Xn 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =81a(2) =420a(3) =1596a(4) =7951a(5) =43448a(6) =222205a(7) =1111647a(8) =5678762a(9) =29269343a(10) =150041512a(11) =767385774a(12) =3932021861a(13) =20164462418a(14) =103363694493a(15) =529734973779
External references
- oeis: A303515