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, -1), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
A149178
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, -1), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =10a(4) =35a(5) =124a(6) =432a(7) =1653a(8) =6238a(9) =24009a(10) =95031a(11) =374816a(12) =1502701a(13) =6081138a(14) =24653680a(15) =101007864a(16) =415326581a(17) =1714309061a(18) =7118874021a(19) =29629533128a(20) =123789902876a(21) =518981830701
External references
- oeis: A149178