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), (-1, -1, 1), (-1, 0, -1), (1, 0, 0), (1, 1, 0)}.
A150057
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), (-1, -1, 1), (-1, 0, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =63a(5) =217a(6) =822a(7) =3042a(8) =12073a(9) =46756a(10) =191331a(11) =764383a(12) =3196583a(13) =13064986a(14) =55529435a(15) =230948432a(16) =994032777a(17) =4191650602a(18) =18224285458a(19) =77714819878a(20) =340690355325
External references
- oeis: A150057