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, 0, -1), (0, 0, 1), (1, 1, 1)}.
A150762
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, 0, -1), (0, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =124a(5) =512a(6) =2200a(7) =9470a(8) =41556a(9) =182960a(10) =814488a(11) =3637820a(12) =16362200a(13) =73814992a(14) =334611760a(15) =1520819838a(16) =6936582500a(17) =31710263120a(18) =145355053848a(19) =667593532372
External references
- oeis: A150762