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 A332514 Numbers k such that phi(k) == 6 (mod 12), where phi is the Euler totient function (A000010). 6
 7, 9, 14, 18, 19, 27, 31, 38, 43, 49, 54, 62, 67, 79, 81, 86, 98, 103, 127, 134, 139, 151, 158, 162, 163, 199, 206, 211, 223, 243, 254, 271, 278, 283, 302, 307, 326, 331, 343, 361, 367, 379, 398, 422, 439, 446, 463, 486, 487, 499, 523, 542, 547, 566, 571, 607, 614 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Dence and Pomerance showed that the asymptotic number of the terms below x is ~ (3/8) * x/log(x). LINKS Amiram Eldar, Table of n, a(n) for n = 1..10000 Thomas Dence and Carl Pomerance, Euler's function in residue classes, in: K. Alladi, P. D. T. A. Elliott, A. Granville and G. Tenebaum (eds.), Analytic and Elementary Number Theory, Developments in Mathematics, Vol. 1, Springer, Boston, MA, 1998, pp. 7-20, alternative link. EXAMPLE 19 is a term since phi(19) = 18 == 6 (mod 12). MATHEMATICA Select[Range[600], Mod[EulerPhi[#], 12] == 6 &] PROG (Magma) [k:k in [1..650]| EulerPhi(k) mod 12 eq 6]; // Marius A. Burtea, Feb 14 2020 CROSSREFS Cf. A000010, A017593, A332511, A332512, A332513, A332515, A332516. Sequence in context: A344011 A320325 A320699 * A353168 A305214 A319877 Adjacent sequences: A332511 A332512 A332513 * A332515 A332516 A332517 KEYWORD nonn AUTHOR Amiram Eldar, Feb 14 2020 STATUS approved

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Last modified August 14 15:53 EDT 2024. Contains 375165 sequences. (Running on oeis4.)