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, 0), (1, -1, 1), (1, 0, -1), (1, 0, 0)}.
A148233
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, 0), (1, -1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =34a(6) =115a(7) =358a(8) =1305a(9) =4394a(10) =16799a(11) =60226a(12) =236724a(13) =886170a(14) =3571278a(15) =13795768a(16) =56634827a(17) =224397093a(18) =934699703a(19) =3777744516a(20) =15931909849a(21) =65442228175a(22) =278812189001
External references
- oeis: A148233