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, 0, -1), (1, 0, -1), (1, 0, 1)}.
A149297
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, 0, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =163a(6) =691a(7) =2761a(8) =11734a(9) =50199a(10) =218371a(11) =964109a(12) =4274622a(13) =19172727a(14) =86702998a(15) =393870617a(16) =1804068528a(17) =8280505767a(18) =38258694113a(19) =177369807157a(20) =825171442348
External references
- oeis: A149297