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, 0), (-1, 0, -1), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
A149176
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, 0), (-1, 0, -1), (-1, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =35a(5) =119a(6) =429a(7) =1581a(8) =6038a(9) =23087a(10) =91042a(11) =358768a(12) =1440873a(13) =5803823a(14) =23629737a(15) =96654265a(16) =397874034a(17) =1645654096a(18) =6836257980a(19) =28512765053a(20) =119339831451a(21) =501063355871
External references
- oeis: A149176