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), (0, 0, -1), (1, 1, 1)}.
A149760
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), (0, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =71a(5) =287a(6) =1227a(7) =5225a(8) =22533a(9) =98501a(10) =435789a(11) =1937773a(12) =8674229a(13) =39013929a(14) =176395377a(15) =800429171a(16) =3645660451a(17) =16650259179a(18) =76271644403a(19) =350201421263
External references
- oeis: A149760