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See A195500 for discussion and list of related sequences; see A195544 for Mathematica program.
Table of n, a(n) for n=1..18.
Cf. A195500, A195544, A195545.
Sequence in context: A049497 A134219 A140593 * A142410 A164940 A137724
Adjacent sequences: A195543 A195544 A195545 * A195547 A195548 A195549
Clark Kimberling, Sep 20 2011