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Table of n, a(n) for n=1..23.
Sequence in context: A000336 A235041 A080613 * A139050 A043309 A104386
Adjacent sequences: A055003 A055004 A055005 * A055007 A055008 A055009
Stephen G. Penrice (spenrice(AT)ets.org), May 30 2000