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, 1, -1), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
A148229
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, 1, -1), (-1, 1, 0), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =33a(6) =118a(7) =347a(8) =1341a(9) =4318a(10) =17545a(11) =59856a(12) =251495a(13) =896183a(14) =3859528a(15) =14217556a(16) =62388697a(17) =235860592a(18) =1050383993a(19) =4055229753a(20) =18275493427a(21) =71790138056a(22) =326702931541
External references
- oeis: A148229