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, 0, 0), (-1, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
A149410
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, 0, 0), (-1, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =52a(5) =197a(6) =887a(7) =3686a(8) =17039a(9) =74498a(10) =350257a(11) =1580535a(12) =7514894a(13) =34622615a(14) =165947569a(15) =775826792a(16) =3740678741a(17) =17676527734a(18) =85615386144a(19) =407871219683
External references
- oeis: A149410