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A067679
Numbers m such that sigma(4m+5) = 6m.
1
3, 16, 91, 304, 5203, 37440, 45136, 32308003, 290634256
OFFSET
1,1
MATHEMATICA
Select[Range[50000], DivisorSigma[1, 4#+5]==6#&] (* The program generates the first 7 terms of the sequence. *) (* Harvey P. Dale, Sep 29 2024 *)
PROG
(PARI) isok(m) = sigma(4*m+5) == 6*m; \\ Michel Marcus, Feb 17 2021
CROSSREFS
Sequence in context: A130744 A344455 A009124 * A099952 A305852 A221764
KEYWORD
nonn,more
AUTHOR
Benoit Cloitre, Feb 04 2002
EXTENSIONS
a(8)-a(9) from Donovan Johnson, Feb 01 2009
STATUS
approved