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), (0, 1, 1), (1, -1, 1), (1, 0, 0)}.
A150025
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), (0, 1, 1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =18a(4) =67a(5) =265a(6) =1099a(7) =4643a(8) =20058a(9) =87824a(10) =389913a(11) =1748536a(12) =7912724a(13) =36077145a(14) =165557041a(15) =764080657a(16) =3543683898a(17) =16507628879a(18) =77195125901a(19) =362254825221
External references
- oeis: A150025