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, 0), (1, 0, -1)}.
A149898
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, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =14a(4) =46a(5) =163a(6) =604a(7) =2312a(8) =9096a(9) =36618a(10) =150109a(11) =624637a(12) =2632371a(13) =11214343a(14) =48222612a(15) =209038216a(16) =912561043a(17) =4008715175a(18) =17707364850a(19) =78605026891a(20) =350490038669
External references
- oeis: A149898