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 A011778 Numbers n where A011776(n) grows. 4
 2, 6, 12, 24, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 480, 630, 672, 720, 1080, 1120, 1260, 1344, 1440, 1890, 2016, 2160, 2240, 2520, 2880, 3024, 3360, 3780, 4032, 4320, 5040, 6048 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Equivalently, 2 along with numbers A092427(n) where A092427(n) > A092427(n-1), for n > 0. - Derek Orr, Apr 16 2015 Is 45 the only odd number in this sequence? - Derek Orr, Apr 16 2015 a(184) = 212837625 and a(311) = 638512875 are the only other odd terms < 10^11. - Charlie Neder, Jan 27 2019 REFERENCES Ivan Niven, Herbert S. Zuckerman and Hugh L. Montgomery, An Introduction to the Theory Of Numbers, Fifth Edition, Wiley NY 1991. J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 251. LINKS Charlie Neder, Table of n, a(n) for n = 1..697 [Terms < 10^11; First 100 terms from T. D. Noe] FORMULA a(n) = A061769(n)+1. a(n) = A092427(A061770(n)). - Derek Orr, Apr 16 2015 CROSSREFS Cf. A011776, A011777, A133481, A092427. Sequence in context: A137895 A194096 A099993 * A067718 A210594 A307252 Adjacent sequences:  A011775 A011776 A011777 * A011779 A011780 A011781 KEYWORD nonn,nice,easy AUTHOR EXTENSIONS Corrected by Vladeta Jovovic, Dec 01 2002 STATUS approved

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Last modified June 25 18:36 EDT 2019. Contains 324353 sequences. (Running on oeis4.)