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, 0, 1), (0, 1, 1), (1, -1, -1), (1, 1, 0)}.
A150486
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, 0, 1), (0, 1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =100a(5) =412a(6) =1760a(7) =7682a(8) =34121a(9) =153694a(10) =699674a(11) =3214634a(12) =14878044a(13) =69300335a(14) =324524864a(15) =1526826465a(16) =7212569244a(17) =34193106665a(18) =162613538217a(19) =775521788639
External references
- oeis: A150486