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, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
A150203
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, 0, 0), (0, 0, 1), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =80a(5) =322a(6) =1347a(7) =5796a(8) =25477a(9) =113874a(10) =515818a(11) =2362069a(12) =10914502a(13) =50815843a(14) =238113099a(15) =1121913889a(16) =5311353117a(17) =25249666932a(18) =120473327642a(19) =576668900224
External references
- oeis: A150203