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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
A149762
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, 0, 0), (-1, 0, 1), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =71a(5) =295a(6) =1235a(7) =5295a(8) =23067a(9) =100741a(10) =446333a(11) =1990923a(12) =8921577a(13) =40238639a(14) =182135331a(15) =827660543a(16) =3774668091a(17) =17261298041a(18) =79153761795a(19) =363820343771
External references
- oeis: A149762