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, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150699
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, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =120a(5) =445a(6) =2129a(7) =8395a(8) =40865a(9) =167087a(10) =820858a(11) =3437518a(12) =16979808a(13) =72329288a(14) =358522822a(15) =1546934617a(16) =7685725419a(17) =33496603906a(18) =166690839148a(19) =732392833745
External references
- oeis: A150699