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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
A150589
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), (0, 1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =113a(5) =468a(6) =2136a(7) =9388a(8) =43911a(9) =199094a(10) =944651a(11) =4375918a(12) =20954162a(13) =98399067a(14) =474273274a(15) =2250151852a(16) =10897911428a(17) =52087759835a(18) =253209013430
External references
- oeis: A150589