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, 0, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.
A148508
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, 0, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =34a(6) =126a(7) =279a(8) =1109a(9) =2630a(10) =10952a(11) =27224a(12) =117069a(13) =301131a(14) =1324917a(15) =3497413a(16) =15659409a(17) =42189154a(18) =191518970a(19) =524581088a(20) =2408054847a(21) =6686510441a(22) =30976454481a(23) =87005843410a(24) =406159058634
External references
- oeis: A148508