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), (-1, 1, 1), (1, -1, 0), (1, 1, 0)}.
A149164
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), (-1, 1, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =40a(5) =119a(6) =547a(7) =1853a(8) =8660a(9) =31519a(10) =149037a(11) =568401a(12) =2710708a(13) =10688967a(14) =51292180a(15) =207333529a(16) =999662616a(17) =4118904097a(18) =19934948055a(19) =83399651303a(20) =404890953262
External references
- oeis: A149164