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Table of n, a(n) for n=1..17.
Cf. A002808, A000290.
Sequence in context: A064751 A045787 A067474 * A173038 A198971 A273230
Adjacent sequences: A053766 A053767 A053768 * A053770 A053771 A053772
G. L. Honaker, Jr., Mar 29 2000
a(9)-a(15) from Donovan Johnson, Dec 04 2009
a(16)-a(17) from Donovan Johnson, Jun 09 2011