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See A188014, A188034.
Table of n, a(n) for n=1..79.
Cf. A188014, A188034, A188035.
Sequence in context: A219666 A026340 A018717 * A090909 A001950 A022841
Adjacent sequences: A188033 A188034 A188035 * A188037 A188038 A188039
Clark Kimberling, Mar 19 2011