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), (1, -1, 1), (1, 1, 0), (1, 1, 1)}.
A150929
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), (1, -1, 1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =33a(4) =151a(5) =647a(6) =3018a(7) =13621a(8) =64552a(9) =298946a(10) =1431184a(11) =6738665a(12) =32483079a(13) =154660161a(14) =749317281a(15) =3595474040a(16) =17487549016a(17) =84392829233a(18) =411708177842
External references
- oeis: A150929