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), (0, 1, 0), (1, 0, -1)}.
A149896
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), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =46a(5) =160a(6) =585a(7) =2194a(8) =8507a(9) =33660a(10) =135829a(11) =555508a(12) =2302992a(13) =9648857a(14) =40825201a(15) =174125274a(16) =748213686a(17) =3235831779a(18) =14076651319a(19) =61555853379a(20) =270458641654
External references
- oeis: A149896