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, 0, 1), (1, 0, -1), (1, 1, 0)}.
A150487
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, 0, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =100a(5) =412a(6) =1770a(7) =7757a(8) =34715a(9) =157340a(10) =721929a(11) =3340801a(12) =15582566a(13) =73129582a(14) =345078964a(15) =1635861836a(16) =7785924688a(17) =37188831495a(18) =178173911708a(19) =856008810970
External references
- oeis: A150487