Now is the time of year when we ask all users of the OEIS for their annual support.
Click here to donate
to the OEIS Foundation using PayPal or in other ways.
Table of n, a(n) for n=0..36.
S. Heubach and T. Mansour, Enumeration of 3-letter patterns in combinations
The Heubach/Mansour paper has a complicated g.f.
Sequence in context: A085489 A101268 A188920 * A001036 A054150 A130709
Adjacent sequences: A128765 A128766 A128767 * A128769 A128770 A128771
Ralf Stephan, May 08 2007
More terms from Vladeta Jovovic, Oct 04 2007