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, 1, 1)}.
A149114
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, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =30a(5) =90a(6) =308a(7) =963a(8) =3438a(9) =11234a(10) =40152a(11) =135794a(12) =490832a(13) =1683168a(14) =6124726a(15) =21354425a(16) =78003828a(17) =274576966a(18) =1008967842a(19) =3580440440a(20) =13189340250a(21) =47178798464a(22) =174283519352a(23) =626647788638
External references
- oeis: A149114