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, 0), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
A150985
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, 0), (0, 1, -1), (0, 1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =163a(5) =734a(6) =3377a(7) =15729a(8) =73892a(9) =349780a(10) =1665412a(11) =7967252a(12) =38262727a(13) =184343364a(14) =890636957a(15) =4313266124a(16) =20932163439a(17) =101767076771a(18) =495560274553
External references
- oeis: A150985