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, 1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
A149963
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, 1, 1), (0, 1, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =54a(5) =191a(6) =708a(7) =2707a(8) =10567a(9) =41958a(10) =169489a(11) =693112a(12) =2862188a(13) =11938097a(14) =50203658a(15) =212547996a(16) =905664031a(17) =3881507300a(18) =16718531338a(19) =72339810648a(20) =314353186474
External references
- oeis: A149963