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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
A150658
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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =120a(5) =536a(6) =2457a(7) =11481a(8) =54360a(9) =259969a(10) =1252706a(11) =6072223a(12) =29572252a(13) =144564197a(14) =708884636a(15) =3484931078a(16) =17168524909a(17) =84731554148a(18) =418805940619
External references
- oeis: A150658