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, 1), (-1, 0, 1), (0, 0, 1), (1, 1, 0)}.
A150130
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, 1), (-1, 0, 1), (0, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =72a(5) =264a(6) =1000a(7) =3878a(8) =15240a(9) =60546a(10) =243264a(11) =985716a(12) =4019362a(13) =16488842a(14) =68015494a(15) =281801936a(16) =1172106868a(17) =4893113206a(18) =20493313992a(19) =86073353954a(20) =362463776814
External references
- oeis: A150130