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A003503
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The larger of a betrothed pair.
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6
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75, 195, 1925, 1648, 2295, 6128, 16587, 20735, 75495, 206504, 219975, 309135, 507759, 549219, 544784, 817479, 1057595, 1902215, 1331967, 1159095, 1763019, 1341495, 1348935, 1524831, 1459143, 2576945, 2226014, 2681019, 2142945, 2421704, 3220119, 3123735
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OFFSET
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1,1
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COMMENTS
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It has been shown that (1) all known betrothed pairs are of opposite parity and (2) if a and b are a betrothed pair, and if a<b are of the same parity, then a>10^10. See the reference for the Hagis & Lord paper. Can it be shown that all betrothed pairs are of opposite parity? - Harvey P. Dale, Apr 07 2013
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REFERENCES
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R. K. Guy, Unsolved Problems in Number Theory, B5.
P. Hagis and G. Lord, Quasi-amicable numbers, Math. Comp. 31 (1977), 608-611.
Computed by fredh(AT)ix.netcom.com (Fred W. Helenius ).
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LINKS
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Donovan Johnson, Table of n, a(n) for n = 1..1000
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CROSSREFS
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Cf. A003502, A005276.
Sequence in context: A044707 A044407 A044788 * A201916 A098230 A174685
Adjacent sequences: A003500 A003501 A003502 * A003504 A003505 A003506
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KEYWORD
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nonn,nice
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AUTHOR
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Robert G. Wilson v
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EXTENSIONS
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Extended by T. D. Noe, Dec 29 2011
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STATUS
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approved
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