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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, 0)}.
A151104
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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =43a(4) =187a(5) =815a(6) =3757a(7) =17183a(8) =81465a(9) =382501a(10) =1842955a(11) =8795475a(12) =42805051a(13) =206505321a(14) =1011728125a(15) =4917939433a(16) =24206397975a(17) =118314241575a(18) =584299089711
External references
- oeis: A151104