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), (1, -1, 1), (1, 1, 0)}.
A149252
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), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =38a(5) =138a(6) =502a(7) =1865a(8) =7224a(9) =28050a(10) =111038a(11) =443212a(12) =1776894a(13) =7204202a(14) =29425674a(15) =120737771a(16) =498100134a(17) =2061928840a(18) =8570899732a(19) =35784144922a(20) =149853702562a(21) =629300079802
External references
- oeis: A149252