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, -1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149458
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, -1, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =50a(5) =200a(6) =835a(7) =3537a(8) =15465a(9) =68572a(10) =308000a(11) =1399208a(12) =6420527a(13) =29670456a(14) =138055045a(15) =646171989a(16) =3039400648a(17) =14358508547a(18) =68101417224a(19) =324112678817
External references
- oeis: A149458