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, -1), (0, 1, -1), (1, 0, 1)}.
A149177
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, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =35a(5) =124a(6) =430a(7) =1647a(8) =6183a(9) =23789a(10) =93982a(11) =369633a(12) =1481709a(13) =5983590a(14) =24232012a(15) =99222087a(16) =407426130a(17) =1680897964a(18) =6975369570a(19) =29010771057a(20) =121164653294a(21) =507700418550
External references
- oeis: A149177