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A180366
Numbers k such that 0 < A000203(k)-k-1 < k.
0
4, 6, 8, 9, 10, 14, 15, 16, 21, 22, 25, 26, 27, 28, 32, 33, 34, 35, 38, 39, 44, 45, 46, 49, 50, 51, 52, 55, 57, 58, 62, 63, 64, 65, 68, 69, 74, 75, 76, 77, 81, 82, 85, 86, 87, 91, 92, 93, 94, 95, 98, 99, 105, 106, 110, 111, 115, 116, 117, 118, 119, 121, 122, 123, 124, 125, 128, 129
OFFSET
1,1
FORMULA
(A005100 U A000396) INTERSECT A002808. - R. J. Mathar, Sep 25 2010
MATHEMATICA
Select[Range[130], CompositeQ[#] && DivisorSigma[-1, #] <= 2 &] (* Amiram Eldar, Mar 18 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alexey Galkin (fetch91(AT)gmail.com), Sep 09 2010
EXTENSIONS
Corrected (4, 16 inserted) by R. J. Mathar, Sep 25 2010
STATUS
approved