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), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
A151122
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), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =194a(5) =856a(6) =3874a(7) =17747a(8) =82404a(9) =385417a(10) =1817913a(11) =8615532a(12) =41064328a(13) =196385786a(14) =943020495a(15) =4539619335a(16) =21919591900a(17) =106043626149a(18) =514218649348
External references
- oeis: A151122