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, 0), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
A149711
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, 0), (-1, 0, 1), (1, -1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =71a(5) =281a(6) =1231a(7) =5153a(8) =22979a(9) =99543a(10) =448661a(11) =1983701a(12) =9013777a(13) =40398115a(14) =184691161a(15) =835861357a(16) =3839728657a(17) =17505347027a(18) =80728468785a(19) =370148336231
External references
- oeis: A149711