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 A171701 The first n-fold (at least) intrinsically 2-palindromic number (in base ten) 24
 3, 8, 18, 24, 48, 60, 120, 120, 180, 336, 360, 360, 720, 720, 720, 840, 1260, 1440, 1680, 1680, 2520, 2520, 2520, 2520, 5040, 5040, 5040, 5040, 5040, 5040, 7560, 7560, 10080, 10080, 10080, 10080, 15120, 15120, 15120, 15120, 30160, 20160, 25200, 25200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS FORMULA If d'(k) is the number of divisors of k minus 1 for square k and minus 2 for numbers of the form m^2+m, then a(n) is the first k for which d'(k)/2>n-1. CROSSREFS Cf. A171702, A171703, A171704, A171705, A171706, A171740, A171741, A171742. Sequence in context: A319764 A063597 A328054 * A288249 A004210 A247022 Adjacent sequences:  A171698 A171699 A171700 * A171702 A171703 A171704 KEYWORD nonn,base AUTHOR James G. Merickel, Dec 16 2009 STATUS approved

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Last modified February 28 08:28 EST 2020. Contains 332323 sequences. (Running on oeis4.)