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Search: id:A126016
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| A126016 |
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Numbers whose aliquot sequence does not terminate in 1. |
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+0
5
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OFFSET
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1,1
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COMMENT
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Sequence continues 276?, 284, 306?, 396?, 417, 445, 496, .... Because 276,306 and 396 are all in the same family, either all 3 are present or none are. It is not known whether any aliquot sequence grows without bound; 276 is the smallest number for which this is unknown.
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LINKS
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Eric Weisstein's World of Mathematics, Aliquot Sequence
P. Zimmermann, Latest information
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CROSSREFS
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Complement of A080907. Includes A000396, A063990 and other sociable numbers, A063769, numbers whose aliquot sequence reaches a sociable number and numbers whose aliquot sequence grows without bound.
Sequence in context: A139235 A136606 A074096 this_sequence A046416 A042879 A042495
Adjacent sequences: A126013 A126014 A126015 this_sequence A126017 A126018 A126019
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KEYWORD
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hard,nonn
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AUTHOR
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Franklin T. Adams-Watters (FrankTAW(AT)Netscape.net), Dec 14 2006
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