On Wed, Sep 2, 2009 at 8:28 PM, Paul D Hanna<pauldhanna at juno.com> wrote: > A related question: > is there an analogous formula for the highest exponent of 3 dividing A155203(n): > http://www.research.att.com/~njas/sequences/A155203 valuation( A155203(n)*n!, 3 ) = n Regards, Max