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), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150271
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), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =91a(5) =383a(6) =1668a(7) =7411a(8) =33476a(9) =152897a(10) =707145a(11) =3299234a(12) =15490659a(13) =73143589a(14) =347167321a(15) =1654542464a(16) =7912965246a(17) =37970582001a(18) =182724292495a(19) =881421183634
External references
- oeis: A150271