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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149471
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, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =55a(5) =206a(6) =929a(7) =3854a(8) =17797a(9) =77497a(10) =364043a(11) =1636237a(12) =7772563a(13) =35679961a(14) =170863707a(15) =796256786a(16) =3836089543a(17) =18077155221a(18) =87495240136a(19) =415839255346
External references
- oeis: A149471