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), (0, -1, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A149451
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), (0, -1, 1), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =49a(5) =186a(6) =751a(7) =3098a(8) =13036a(9) =55559a(10) =239741a(11) =1045683a(12) =4598980a(13) =20368516a(14) =90733028a(15) =406321477a(16) =1827966938a(17) =8257125139a(18) =37430455001a(19) =170216663711a(20) =776294282712
External references
- oeis: A149451