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Table of n, a(n) for n=1..90.
Cf. A000007, A033324, A033347, A057067-A057075.
Sequence in context: A133487 A188830 A103949 * A186482 A186474 A093861
Adjacent sequences: A057063 A057064 A057065 * A057067 A057068 A057069
Henry Bottomley, Jul 31 2000