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, 0, -1), (1, 1, 0)}.
A149148
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, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =38a(5) =111a(6) =487a(7) =1613a(8) =7266a(9) =25898a(10) =118756a(11) =444424a(12) =2062730a(13) =7995233a(14) =37424774a(15) =148969816a(16) =701627984a(17) =2851691801a(18) =13493743151a(19) =55771863728a(20) =264858505725
External references
- oeis: A149148