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A216072 Aliquot open end sequences which belong to distinct families. 3
276, 552, 564, 660, 966, 1074, 1134, 1464, 1476, 1488, 1512, 1560, 1578, 1632, 1734, 1920, 1992, 2232, 2340, 2360, 2484, 2514, 2664, 2712, 2982, 3270, 3366, 3408, 3432, 3564, 3678, 3774, 3876, 3906, 4116, 4224, 4290, 4350, 4380, 4788, 4800, 4842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These aliquot sequences are believed to grow forever without terminating in a prime or entering a cycle.

Sequence A131884 lists all the starting values of an aliquot sequence that lead to open-ending. It includes all values obtained by iterating from the starting values of this sequence. But this sequence lists only the values that are the lowest starting elements of open end aliquot sequences that are the part of different open-ending families. - V. Raman, Dec 08 2012

LINKS

V. Raman, Table of n, a(n) for n = 1..81

Christophe Clavier, Aliquot Sequences with leading terms < 10000

Wolfgang Creyaufm├╝ller, Aliquot Sequences

CROSSREFS

Cf. A008892, A098007, A131884, A115350.

Sequence in context: A284279 A228517 A008892 * A284277 A133215 A015232

Adjacent sequences:  A216069 A216070 A216071 * A216073 A216074 A216075

KEYWORD

nonn

AUTHOR

V. Raman, Sep 01 2012

STATUS

approved

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Last modified January 20 05:47 EST 2020. Contains 331067 sequences. (Running on oeis4.)