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, 1), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150950
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, 1), (0, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =155a(5) =677a(6) =3095a(7) =14118a(8) =65638a(9) =305990a(10) =1441145a(11) =6806351a(12) =32340167a(13) =154078157a(14) =737054642a(15) =3533761685a(16) =16991087801a(17) =81854181707a(18) =395188982837
External references
- oeis: A150950