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A211679 Triangle of earliest friendly numbers having n friends. 3
6, 28, 6, 28, 496, 84, 270, 1488, 1638, 84, 270, 1488, 1638, 24384, 210, 17360, 43400, 284480, 2229500, 2886100, 3780, 66960, 167400, 406224, 1097280, 6656832, 13035330, 3780, 66960, 167400, 406224, 1097280, 6656832, 13035330, 29410290 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
COMMENTS
Row n contains the earliest set of friendly numbers of length n. The sequence A211677 contains the last element of each row.
LINKS
CROSSREFS
Cf. A074902 (friendly numbers), A211677.
Sequence in context: A101454 A091911 A215896 * A261868 A342922 A357462
KEYWORD
nonn,tabf,hard
AUTHOR
T. D. Noe, May 10 2012
STATUS
approved

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Last modified May 24 05:24 EDT 2024. Contains 372772 sequences. (Running on oeis4.)