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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149701
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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =69a(5) =277a(6) =1177a(7) =4997a(8) =21743a(9) =95197a(10) =421221a(11) =1876235a(12) =8408775a(13) =37879153a(14) =171377779a(15) =778373055a(16) =3546990371a(17) =16211876805a(18) =74293350841a(19) =341275455053
External references
- oeis: A149701