Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
A150446
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =102a(5) =417a(6) =1870a(7) =8084a(8) =37470a(9) =168965a(10) =794731a(11) =3654241a(12) =17409564a(13) =81476048a(14) =390757848a(15) =1846159739a(16) =8911674092a(17) =42495832330a(18) =205901393430a(19) =987251611544
External references
- oeis: A150446