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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
A149785
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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =351a(6) =1579a(7) =7157a(8) =33017a(9) =153735a(10) =721627a(11) =3409687a(12) =16198383a(13) =77290035a(14) =370247401a(15) =1779351989a(16) =8574843743a(17) =41427163363a(18) =200582985589a(19) =973005897099
External references
- oeis: A149785