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, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148110
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, 0), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =28a(6) =82a(7) =255a(8) =817a(9) =2736a(10) =9364a(11) =32887a(12) =117702a(13) =429126a(14) =1588138a(15) =5956905a(16) =22619993a(17) =86823782a(18) =336549149a(19) =1316036640a(20) =5188377504a(21) =20605943013a(22) =82394676296a(23) =331529401307
External references
- oeis: A148110