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, 1, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
A149731
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, 1, 1), (1, 0, -1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =75a(5) =295a(6) =1355a(7) =5735a(8) =26889a(9) =119049a(10) =563877a(11) =2559583a(12) =12233685a(13) =56509413a(14) =271749707a(15) =1271367259a(16) =6142981385a(17) =29011812723a(18) =140710423527a(19) =669480882365
External references
- oeis: A149731