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), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
A151112
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), (0, 0, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =189a(5) =830a(6) =3698a(7) =16803a(8) =77145a(9) =357834a(10) =1672084a(11) =7862842a(12) =37169079a(13) =176475296a(14) =841103460a(15) =4021822414a(16) =19286346889a(17) =92718060492a(18) =446739383833
External references
- oeis: A151112