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), (1, -1, 0), (1, 1, -1), (1, 1, 0), (1, 1, 1)}.
A150989
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), (1, -1, 0), (1, 1, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =167a(5) =752a(6) =3503a(7) =16338a(8) =77337a(9) =367016a(10) =1755693a(11) =8417735a(12) =40551629a(13) =195740690a(14) =947789781a(15) =4596821237a(16) =22343646643a(17) =108754769594a(18) =530209557941
External references
- oeis: A150989