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, 1, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A149374
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, 1, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =47a(5) =162a(6) =711a(7) =2793a(8) =12113a(9) =49196a(10) =221666a(11) =942290a(12) =4229610a(13) =18235322a(14) =83386846a(15) =367729931a(16) =1678926008a(17) =7460343556a(18) =34432541595a(19) =155038893329a(20) =715065882121
External references
- oeis: A149374