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, -1), (-1, 0, 0), (-1, 0, 1), (0, 1, 0), (1, 0, 0)}.
A150041
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, -1), (-1, 0, 0), (-1, 0, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =58a(5) =198a(6) =689a(7) =2517a(8) =9252a(9) =34974a(10) =133343a(11) =515540a(12) =2016424a(13) =7938561a(14) =31593267a(15) =126264754a(16) =508683281a(17) =2058402166a(18) =8372464271a(19) =34216910642a(20) =140309572880a(21) =577888143880
External references
- oeis: A150041