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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150291
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, 0), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =93a(5) =395a(6) =1715a(7) =7628a(8) =34515a(9) =158261a(10) =733349a(11) =3425978a(12) =16116745a(13) =76247726a(14) =362489048a(15) =1730424090a(16) =8290157145a(17) =39839993841a(18) =191980105704a(19) =927330790608
External references
- oeis: A150291