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, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150646
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, 0), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =115a(5) =500a(6) =2222a(7) =10067a(8) =46210a(9) =214561a(10) =1005078a(11) =4737301a(12) =22463677a(13) =107029474a(14) =511992191a(15) =2457370516a(16) =11830812439a(17) =57106820758a(18) =276269824537
External references
- oeis: A150646