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, 0), (-1, 1, -1), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
A150038
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, 0), (-1, 1, -1), (0, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =17a(4) =64a(5) =227a(6) =871a(7) =3359a(8) =13652a(9) =55101a(10) =227586a(11) =952299a(12) =4035236a(13) =17138824a(14) =73679165a(15) =319022507a(16) =1387532405a(17) =6062569327a(18) =26665424994a(19) =117732051064a(20) =521367618463
External references
- oeis: A150038