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), (0, 0, -1), (1, 0, 0), (1, 1, 0)}.
A150327
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), (0, 0, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =22a(4) =87a(5) =323a(6) =1342a(7) =5468a(8) =23419a(9) =100418a(10) =440643a(11) =1947254a(12) =8713746a(13) =39265051a(14) =178424429a(15) =815376294a(16) =3749149497a(17) =17318997226a(18) =80376437925a(19) =374471291983
External references
- oeis: A150327