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, -1, 1), (0, 1, 0), (1, 0, 0)}.
A150045
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, -1, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =60a(5) =208a(6) =751a(7) =2822a(8) =10753a(9) =42183a(10) =166628a(11) =670911a(12) =2722417a(13) =11173737a(14) =46266435a(15) =192810207a(16) =810214354a(17) =3419430626a(18) =14528960377a(19) =61978178651a(20) =265684720397
External references
- oeis: A150045