[seqfan] Thought for the day

Richard Guy rkg at cpsc.ucalgary.ca
Thu Mar 11 20:19:27 CET 2010

A003733 = 5 * (A143699)^2, where A143699 has the
same recurrence as A003729, which has the ``wrong''
initial values.  No doubt Paul Raff & others can
see the connexion twixt the complexity and the
number of perfect matchings of  C5 x Pn.   R.

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