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A015801
Numbers k such that phi(k) + 10 | sigma(k).
1
6, 12, 30, 68, 96, 264, 368, 2064, 4240, 4636, 6588, 7276, 10272, 11800, 36600, 188544, 251648, 415000, 1296640, 3113472, 50202624, 201068544, 16097947360, 17177182208, 25876667904, 85895741440
OFFSET
1,1
COMMENTS
a(27) > 10^12. - Donovan Johnson, Feb 28 2012
MATHEMATICA
Select[Range[1000000], Divisible[DivisorSigma[1, #], EulerPhi[#]+10]&] (* Harvey P. Dale, Jul 17 2011 *)
CROSSREFS
Sequence in context: A014131 A236539 A122211 * A073245 A119626 A152522
KEYWORD
nonn
EXTENSIONS
More terms from Harvey P. Dale, Jul 17 2011
Offset corrected and a(19)-a(26) from Donovan Johnson, Feb 28 2012
STATUS
approved