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 A126165 Smaller member of each exponential amicable pair. 12
 90972, 454860, 937692, 1000692, 1182636, 1546524, 2092356, 2638188, 2820132, 3365964, 3729852, 3911796, 4275684, 4548600, 4688460, 4821516, 5003460, 5367348, 5549292, 5913180, 6095124, 6459012, 6640956, 7186788, 7550676, 7732620, 8096508, 8824284, 9188172, 9370116 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence includes the smallest member of all exponential amicable pairs and does not discriminate between primitive and nonprimitive pairs. LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 Peter Hagis, Jr., Some results concerning exponential divisors, International Journal of Mathematics and Mathematical Sciences, Vol. 11, No. 2, (1988), pp. 343-349. Ant King, Mathematica programs for A126164 - A126166 David Moews, Perfect, amicable and sociable numbers. J. M. Pedersen, Known exponential amicable pairs. FORMULA The values of m for which esigma(m)=esigma(n)=m+n and m n && esigma[m] - m == n, AppendTo[s, n]], {n, 1, 10^7}]; s (* Amiram Eldar, May 09 2019 *) CROSSREFS Cf. A051377, A054979, A049419, A054980, A126164. Sequence in context: A212853 A127660 A127659 * A323753 A255985 A253838 Adjacent sequences: A126162 A126163 A126164 * A126166 A126167 A126168 KEYWORD nonn AUTHOR Ant King, Dec 21 2006 EXTENSIONS More terms from Amiram Eldar, May 09 2019 STATUS approved

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Last modified August 11 01:05 EDT 2024. Contains 375059 sequences. (Running on oeis4.)