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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150275
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, 0), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =87a(5) =344a(6) =1430a(7) =6006a(8) =25638a(9) =111108a(10) =485979a(11) =2144374a(12) =9526239a(13) =42581108a(14) =191357708a(15) =863551551a(16) =3912874126a(17) =17792811362a(18) =81149740528a(19) =371155976937
External references
- oeis: A150275