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, 0, 0), (-1, 1, 1), (0, -1, 0), (1, 0, -1), (1, 1, 0)}.
A149353
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, 0, 0), (-1, 1, 1), (0, -1, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =42a(5) =158a(6) =614a(7) =2432a(8) =9999a(9) =41656a(10) =176122a(11) =756265a(12) =3282145a(13) =14366101a(14) =63486090a(15) =282547790a(16) =1265206244a(17) =5701051412a(18) =25822151736a(19) =117485179665a(20) =536948393330
External references
- oeis: A149353