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Subsequence of A042986 apart from first term; a(n+1)=A042986(n) for n<25.
R. Zumkeller, Table of n, a(n) for n = 1..1000
Cf. A012883, A012884.
Sequence in context: A040065 A051647 A042986 * A038617 A036962 A160337
Adjacent sequences: A143387 A143388 A143389 * A143391 A143392 A143393
Reinhard Zumkeller, Aug 13 2008