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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.
A151177
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, 1, -1), (1, 0, 0), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =3a(2) =12a(3) =49a(4) =224a(5) =1003a(6) =4795a(7) =22343a(8) =108701a(9) =517169a(10) =2539693a(11) =12239287a(12) =60428125a(13) =293673869a(14) =1454899827a(15) =7112278267a(16) =35315525591a(17) =173378316769a(18) =862262869950
External references
- oeis: A151177