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, -1, 1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
A150586
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, -1, 1), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =110a(5) =479a(6) =2172a(7) =10002a(8) =46834a(9) =221461a(10) =1056587a(11) =5074301a(12) =24505397a(13) =118882368a(14) =578908059a(15) =2828055381a(16) =13852580674a(17) =68010146230a(18) =334558354721
External references
- oeis: A150586