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, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
A148822
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, 0), (-1, 1, 0), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =26a(5) =94a(6) =303a(7) =1154a(8) =4372a(9) =15884a(10) =62623a(11) =244797a(12) =953760a(13) =3813186a(14) =15279908a(15) =61791682a(16) =250255955a(17) =1021461121a(18) =4211124573a(19) =17290514080a(20) =71510272399a(21) =298032145342
External references
- oeis: A148822