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Table of n, a(n) for n=1..78.
Cf. A000005, A073668, A122667, A122668.
Sequence in context: A318412 A322986 A167447 * A184395 A329484 A179941
Adjacent sequences: A134684 A134685 A134686 * A134688 A134689 A134690
Omar E. Pol, Nov 06 2007