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), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149710
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), (1, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =71a(5) =281a(6) =1229a(7) =5147a(8) =22939a(9) =99357a(10) =447839a(11) =1979645a(12) =8996327a(13) =40314685a(14) =184327269a(15) =834152475a(16) =3832197717a(17) =17470252835a(18) =80572460719a(19) =369423925933
External references
- oeis: A149710