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URL: https://oeis.org/A067685

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A067685
Numbers n such that sigma(4n+1)=6n.
0
1, 8, 65, 96, 224, 560, 6734, 11648, 3588320, 67969536, 290575208, 1629860960, 4758938912, 10769110400
OFFSET
1,2
MATHEMATICA
Select[Range[36*10^5], 6#==DivisorSigma[1, 4#+1]&] (* The program generates the first 9 terms of the sequence. *) (* Harvey P. Dale, Mar 20 2026 *)
CROSSREFS
Sequence in context: A202783 A067215 A307436 * A304306 A316205 A305772
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Feb 04 2002
EXTENSIONS
a(9)-a(14) from Donovan Johnson, Feb 01 2009
STATUS
approved