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, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149793
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, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =83a(5) =365a(6) =1659a(7) =7589a(8) =35387a(9) =166153a(10) =785583a(11) =3736829a(12) =17866469a(13) =85718233a(14) =412662891a(15) =1992429935a(16) =9642542979a(17) =46762817949a(18) =227214462363
External references
- oeis: A149793