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), (0, 0, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A150867
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), (0, 0, 1), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =144a(5) =646a(6) =2956a(7) =13714a(8) =64303a(9) =303914a(10) =1445380a(11) =6908740a(12) =33159727a(13) =159704801a(14) =771417955a(15) =3735457375a(16) =18127282503a(17) =88132763487a(18) =429200044451
External references
- oeis: A150867