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 A259632 a(n) = floor(exp(H_k)*log(H_k)) - sigma(k) where k is the n-th colossally abundant number (Sequence A079526 applied to the colossally abundant numbers (A004490).) 0
 -2, -2, -3, -2, 0, 28, 199, 483, 9040, 143814, 306295, 963844, 5155067, 81053615, 1334916470, 29106956400, 58655156000, 1817551640000, 56466287000000, 376943530000000, 1144451930000000, 41803527000000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It follows easily from the work of Lagarias that the Riemann hypothesis is equivalent to this sequence's being nonnegative except for the first four terms. LINKS J. C. Lagarias, An elementary problem equivalent to the Riemann hypothesis, Am. Math. Monthly 109 (#6, 2002), 534-543. CROSSREFS Cf. A004490, A079526. Sequence in context: A127638 A127639 A248081 * A304041 A238509 A253141 Adjacent sequences:  A259629 A259630 A259631 * A259633 A259634 A259635 KEYWORD sign AUTHOR Gene Ward Smith, Dec 17 2016 STATUS approved

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Last modified September 25 11:42 EDT 2020. Contains 337337 sequences. (Running on oeis4.)