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, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A149044
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, 1, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =37a(5) =141a(6) =581a(7) =2410a(8) =10360a(9) =44924a(10) =198919a(11) =886599a(12) =4001741a(13) =18167569a(14) =83200913a(15) =382777451a(16) =1771864969a(17) =8233910451a(18) =38441078019a(19) =180044247192a(20) =846284724044
External references
- oeis: A149044