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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149219
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, 0), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =42a(5) =145a(6) =617a(7) =2418a(8) =10527a(9) =43798a(10) =195143a(11) =841025a(12) =3814325a(13) =16840580a(14) =77360042a(15) =347761521a(16) =1612823330a(17) =7351384114a(18) =34353120607a(19) =158284028430a(20) =744310087644
External references
- oeis: A149219