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, 0), (1, -1, 0), (1, 1, 0)}.
A149123
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, 0), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =97a(6) =373a(7) =1215a(8) =4768a(9) =16429a(10) =65917a(11) =237771a(12) =968122a(13) =3580933a(14) =14767182a(15) =55993927a(16) =232930254a(17) =896421657a(18) =3758595523a(19) =14693407001a(20) =61959876696a(21) =244614547867
External references
- oeis: A149123