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, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 0)}.
A150319
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, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =91a(5) =327a(6) =1484a(7) =5675a(8) =26890a(9) =108150a(10) =518000a(11) =2134639a(12) =10387785a(13) =43812503a(14) =214054127a(15) =914666899a(16) =4502498672a(17) =19496286492a(18) =96142162678a(19) =419739091653
External references
- oeis: A150319