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 A161005 Sums of adjacent amicable numbers, a(n) = A063990(2n-1) + A063990(2n). 9
 504, 2394, 5544, 10584, 12600, 21600, 26880, 35712, 129948, 134087, 140760, 155834, 176363, 222750, 245520, 263970, 283974, 321906, 348128, 357184, 382092, 405876, 589160, 675958, 755008, 829994, 892800, 955206, 1017792, 1048320 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Warning: The numbers being summed will not always belong to the same amicable pair. See A180164 for the sums of amicable pairs. - Jeppe Stig Nielsen, Jan 27 2015 LINKS T. D. Noe, Table of n, a(n) for n=1..1000 EXAMPLE a(1) = 504 = 220 + 284. a(2) = 2394 = 1184 + 1210. a(3) = 5544 = 2620 + 2694. MATHEMATICA s[n_] := DivisorSigma[1, n] - n; AmicableNumberQ[n_] := If[Nest[s, n, 2] == n && ! s[n] == n, True, False]; a = Select[Range[10^6], AmicableNumberQ[ # ] &]; Table[a[[n + 1]] + a[[n]], {n, 1, Length[a], 2}] (* Roger L. Bagula, May 29 2010, based on Ant King's Mathematica program from A063990 *) CROSSREFS Cf. A063990, A259180. Sequence in context: A226265 A277114 A269038 * A259953 A180164 A263286 Adjacent sequences:  A161002 A161003 A161004 * A161006 A161007 A161008 KEYWORD nonn,less AUTHOR Claudio Meller, Jun 01 2009 EXTENSIONS Corrected and extended by Roger L. Bagula, May 29 2010 Edited by N. J. A. Sloane, Aug 14 2010, at the suggestion of Jason G. Wurtzel STATUS approved

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Last modified June 1 04:57 EDT 2020. Contains 334758 sequences. (Running on oeis4.)