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), (1, -1, 1), (1, 0, -1)}.
A149032
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), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =34a(5) =124a(6) =484a(7) =1918a(8) =7749a(9) =32067a(10) =134194a(11) =568493a(12) =2435542a(13) =10508758a(14) =45709216a(15) =200171229a(16) =881065532a(17) =3898657609a(18) =17330389586a(19) =77335498887a(20) =346384232095
External references
- oeis: A149032