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, 1), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
A149000
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, 1), (1, 0, -1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =34a(5) =114a(6) =486a(7) =1815a(8) =8047a(9) =32329a(10) =146648a(11) =616619a(12) =2844307a(13) =12336551a(14) =57618747a(15) =255632893a(16) =1205234788a(17) =5440572990a(18) =25837095210a(19) =118232679572a(20) =564711211749
External references
- oeis: A149000