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, -1, 1), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
A149106
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, -1, 1), (-1, 0, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =34a(5) =91a(6) =386a(7) =1205a(8) =5146a(9) =17422a(10) =75144a(11) =267296a(12) =1161554a(13) =4276938a(14) =18677450a(15) =70571075a(16) =309208856a(17) =1191846297a(18) =5234648979a(19) =20497505744a(20) =90190143442a(21) =357689841471
External references
- oeis: A149106