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, 1), (0, 0, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
A150577
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, 1), (0, 0, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =108a(5) =463a(6) =2053a(7) =9276a(8) =42580a(9) =197621a(10) =925797a(11) =4367991a(12) =20729923a(13) =98861972a(14) =473396633a(15) =2274642969a(16) =10962025393a(17) =52963617803a(18) =256467666679
External references
- oeis: A150577