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, 0), (0, 0, -1), (0, 1, 1), (1, 0, 0)}.
A150175
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, 0), (0, 0, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =77a(5) =295a(6) =1189a(7) =4867a(8) =20499a(9) =87115a(10) =375222a(11) =1631334a(12) =7157895a(13) =31624642a(14) =140559349a(15) =628073412a(16) =2819894070a(17) =12713368702a(18) =57529575906a(19) =261182939740
External references
- oeis: A150175