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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
A149826
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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =28a(5) =85a(6) =275a(7) =924a(8) =3161a(9) =11123a(10) =40356a(11) =148994a(12) =555317a(13) =2099039a(14) =8057473a(15) =31247345a(16) =122019881a(17) =480549169a(18) =1909455313a(19) =7638161881a(20) =30713415080a(21) =124209720711a(22) =505237712256
External references
- oeis: A149826