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1,1
For references and links see A089472.
Table of n, a(n) for n=1..10.
a(1)=2, a(n) = (A089472(n) + 1) / 2 for n>1
A089472 is the main entry for this sequence. Cf. A003432, A013588, A051236.
Sequence in context: A103599 A032245 A013588 * A066015 A065482 A319638
Adjacent sequences: A108147 A108148 A108149 * A108151 A108152 A108153
hard,nonn
William P. Orrick, Jan 12 2006
approved