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, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150564
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, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =107a(5) =455a(6) =1997a(7) =8943a(8) =40724a(9) =187692a(10) =873596a(11) =4098024a(12) =19348509a(13) =91843291a(14) =437942044a(15) =2096335325a(16) =10068086873a(17) =48493635634a(18) =234162526076
External references
- oeis: A150564