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, 1), (-1, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
A150202
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, 1), (-1, 0, 1), (0, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =80a(5) =311a(6) =1270a(7) =5312a(8) =22519a(9) =96946a(10) =422507a(11) =1855251a(12) =8209543a(13) =36577480a(14) =163796018a(15) =736910489a(16) =3329734404a(17) =15098891288a(18) =68685017199a(19) =313380803066
External references
- oeis: A150202