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, 0), (-1, 0, 0), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A151021
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, 0), (-1, 0, 0), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =36a(4) =172a(5) =728a(6) =3464a(7) =15568a(8) =74544a(9) =344736a(10) =1661120a(11) =7813024a(12) =37832352a(13) =179948288a(14) =874662336a(15) =4193406912a(16) =20443796032a(17) =98592134144a(18) =481820595712
External references
- oeis: A151021