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 A307052 Larger of amicable numbers pair m < n such that A307037(m) = n and A307037(n) = m. 1
 5, 17, 80, 257, 1280, 4352, 8060, 65537, 327680, 1065220, 1089452, 1114112, 16842752, 100340800, 383479200, 466344000000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The terms are ordered according to their lesser counterparts (A307051). a(17) > 4*10^12. - Giovanni Resta, Mar 24 2019 LINKS Table of n, a(n) for n=1..16. MATHEMATICA f[p_, e_] := p^e + (-1)^e; a[1] = 1; a[n_] := Times @@ f @@@ FactorInteger[n]; s={}; Do[m = a[n]; If[m > n && a[m] == n, AppendTo[s, m]], {n, 1, 10^7}]; s CROSSREFS Cf. A307037, A307038, A307051. Sequence in context: A149747 A149748 A151494 * A053418 A151882 A359206 Adjacent sequences: A307049 A307050 A307051 * A307053 A307054 A307055 KEYWORD nonn,more AUTHOR Amiram Eldar, Mar 21 2019 EXTENSIONS a(16) from Giovanni Resta, Mar 24 2019 STATUS approved

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Last modified December 3 22:01 EST 2023. Contains 367540 sequences. (Running on oeis4.)