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, 0, 0), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150945
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, 0, 0), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =149a(5) =665a(6) =2986a(7) =13538a(8) =62963a(9) =292567a(10) =1369313a(11) =6478437a(12) =30684591a(13) =145862057a(14) =697855915a(15) =3341734742a(16) =16041352603a(17) =77313798602a(18) =372938012558
External references
- oeis: A150945