# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a123124 Showing 1-1 of 1 %I A123124 #8 Sep 19 2022 06:21:51 %S A123124 2,4,5,6,4,4,6,6,8,11,13,6,13,4 %N A123124 Sequence gives values of k in A122483. %t A123124 f[p_, e_] := (p^(e+1)-2*p+1) * (p^(e+1)-1)/((p-1)^2 * (p^e - 1)); s[n_] := (Times @@ f @@@ FactorInteger[n])/n; Select[s /@ Range[2, 10^5], IntegerQ] (* _Amiram Eldar_, Sep 19 2022 *) %Y A123124 Cf. A122483. %K A123124 nonn,more %O A123124 1,1 %A A123124 _Yasutoshi Kohmoto_ Sep 30 2006 %E A123124 More terms from _R. J. Mathar_, Oct 01 2006 %E A123124 a(12)-a(14) from _Amiram Eldar_, Sep 19 2022 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE