[seqfan] Oops! guess the formula http://oeis.org/A200786

Ron Hardin rhhardin at att.net
Tue Nov 22 20:05:59 CET 2011


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A formula for T(n.k) http://oeis.org/A200786 might be guessable, after the 
formula for 

column 2 given in http://oeis.org/A076264

a(n)=sum{k=0..floor(n/3), binomial(n-2k, k)(-1)^k*3^(n-3k)}

with the right generalization (I didn't stumble into it though).

Sorry about the bad links!

 rhhardin at mindspring.com
rhhardin at att.net (either)




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