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Suggested by the definition of A177018. The first 23 values match with A080370, as do 48 of the first 60 values. Is this a coincidence?
Table of n, a(n) for n=1..61.
Cf. A067076, A177018 A080370
Sequence in context: A094227 A085225 A080370 * A210241 A190498 A077472
Adjacent sequences: A175537 A175538 A175539 * A175541 A175542 A175543
Marc LeBrun, Jun 18 2010