A046567 First denominator and then numerator of the 1/4-Pascal triangle (by row), excluding 1's and 4's.
5, 5, 9, 2, 5, 9, 13, 19, 19, 13, 17, 8, 2, 19, 8, 17, 21, 49, 2, 35, 2, 35, 49, 21, 25, 2, 35, 119, 35, 119, 2, 35, 25, 29, 95, 189, 259, 259, 189, 95, 29, 33, 31, 71, 112, 2, 259, 112, 71, 31, 33, 37, 157, 102, 183, 2, 483, 2, 483, 183, 102, 157, 37, 41, 2, 97, 565, 285, 2
Offset: 1
Examples
1/1; 1/1 1/1; 1/1 1/4 1/1; 1/1 5/4 5/4 1/1; 1/1 9/4 5/2 9/4 1/1; 1/1 13/4 19/4 19/4 13/4 1/1; 1/1 17/4 8/1 19/2 8/1 17/4 1/1; 1/1 21/4 49/4 35/2 35/2 49/4 21/4 1/1; ...
Crossrefs
Cf. A046563.
Extensions
More terms from James Sellers, Dec 14 1999