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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 A149749

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 September 21 09:44 EDT 2020. Contains 337268 sequences. (Running on oeis4.)