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, 0, 1), (1, -1, -1), (1, 1, -1), (1, 1, 0)}.
A148891
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, 0, 1), (1, -1, -1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =99a(6) =411a(7) =1512a(8) =6497a(9) =25717a(10) =113560a(11) =470615a(12) =2119435a(13) =9069212a(14) =41430503a(15) =181543837a(16) =838373030a(17) =3740867568a(18) =17423551011a(19) =78857867841a(20) =369838661718
External references
- oeis: A148891