login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A184393
The smallest number m such that sigma(m) = A007368(n), where A007368(n) = the smallest k such that sigma(x) = k has exactly n solutions.
4
1, 6, 14, 42, 30, 60, 114, 132, 120, 204, 210, 480, 408, 390, 264, 930, 1080, 1860, 864, 870, 552, 3120, 4080, 1140, 1380, 1020, 2460, 2184, 840, 2040, 3480, 4140, 1560, 2208, 1320, 3780, 1848, 5544, 7590, 6468, 8544, 13500, 8280, 8190, 4872, 4620, 8856
OFFSET
1,2
COMMENTS
A184394 is the sequence of the largest such numbers. Row n of A201915 gives all n values satisfying sigma(x) = A007368(n).
LINKS
EXAMPLE
For n = 5, sequence of defined numbers m_5: 30, 46, 51, 55, 71; a(5) = 30.
CROSSREFS
Sequence in context: A134259 A069166 A379156 * A093369 A130443 A349835
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Jan 12 2011
EXTENSIONS
Extended by T. D. Noe, Jan 24 2012
STATUS
approved