Number of Possible Trees

Question

How many total Homeomorphically Irreducible Trees are possible with 'n' nodes ?

Comments

matt damon solved this question in Good will hunting ;)

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Yeah bro,  you recognized the movie :p... But he solved for n =10..here I m asking that is there any generalized formula for it .

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I'll try after some time. :p

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That was a good question and good movie too :P