A046596 Denominators of the 1/4-Pascal triangle (by row), excluding 2's.
1, 1, 1, 1, 4, 1, 1, 4, 4, 1, 1, 4, 4, 1, 1, 4, 4, 4, 4, 1, 1, 4, 1, 1, 4, 1, 1, 4, 4, 4, 4, 1, 1, 4, 4, 1, 4, 4, 1, 1, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 4, 1, 1, 1, 1, 1, 1, 4, 1, 1, 4, 4, 1, 1, 1, 1, 4, 4, 1, 1, 4, 4, 1, 1, 1, 4, 4, 1, 1, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 4, 1, 1, 4, 1, 1, 1, 4, 1, 1, 4, 1, 1, 4, 4, 4
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