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Table of n, a(n) for n=1..28.
3_24 = 18^2.
Cf. A102567, A106497, A115527 - A115556.
Sequence in context: A066643 A140065 A294418 * A005995 A034503 A026557
Adjacent sequences: A115546 A115547 A115548 * A115550 A115551 A115552
Giovanni Resta, Jan 25 2006