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, 1, -1), (1, -1, 0), (1, 0, 1)}.
A149034
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, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =34a(5) =129a(6) =502a(7) =2032a(8) =8462a(9) =35852a(10) =154565a(11) =675899a(12) =2987199a(13) =13340857a(14) =60068598a(15) =272467777a(16) =1243944728a(17) =5710995281a(18) =26354122717a(19) =122157252775a(20) =568553772397
External references
- oeis: A149034