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 A008606 Multiples of 24. 27
 0, 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264, 288, 312, 336, 360, 384, 408, 432, 456, 480, 504, 528, 552, 576, 600, 624, 648, 672, 696, 720, 744, 768, 792, 816, 840, 864, 888, 912, 936, 960, 984, 1008, 1032, 1056, 1080, 1104, 1128, 1152, 1176, 1200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS If n is a multiple of 24, also the sum of the divisors of n-1 is a multiple of 24. - Vincenzo Librandi, Apr 12 2014 This is the sequence of numbers n such that A259748(n)/n = 11/12. - Danny Rorabaugh, Oct 22 2015 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Milan Janjic, Enumerative Formulas for Some Functions on Finite Sets Tanya Khovanova, Recursive Sequences INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 336 Index entries for linear recurrences with constant coefficients, signature (2, -1). FORMULA G.f.: 24*x/(1-x)^2. - Vincenzo Librandi, Jun 11 2013 a(n) = 24*A001477(n) - Danny Rorabaugh, Oct 24 2015 MATHEMATICA Range[0, 1500, 24] (* Vladimir Joseph Stephan Orlovsky, Jun 01 2011 *) CoefficientList[Series[24 x / (x - 1)^2, {x, 0, 60}], x] (* Vincenzo Librandi, Jun 11 2013 *) PROG (PARI) a(n)=24*n \\ Charles R Greathouse IV, Sep 24 2015 CROSSREFS Cf. A008604, A008605. Sequence in context: A257861 A050497 A162282 * A317971 A141767 A327947 Adjacent sequences: A008603 A008604 A008605 * A008607 A008608 A008609 KEYWORD nonn,easy AUTHOR N. J. A. Sloane. STATUS approved

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Last modified June 14 21:35 EDT 2024. Contains 373401 sequences. (Running on oeis4.)