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Intersection of A012883 and A143390. [From Reinhard Zumkeller, Aug 13 2008]
Table of n, a(n) for n=1..31.
Sequence in context: A036962 A160337 A190222 * A068669 A100553 A175584
Adjacent sequences: A012881 A012882 A012883 * A012885 A012886 A012887
Larry Calmer (larry(AT)wri.com), Simon Plouffe
Last term is 739397 (confirmed by David W. Wilson).