A334839 Totients congruent to 2 mod 4 and that have multiplicity 4.
6, 18, 42, 162, 486, 1458, 4422, 6162, 14406, 19182, 22650, 26406, 39366, 77658, 143262, 412806, 527802, 564898, 843642, 981090, 1514130, 2023506, 2453922, 3050262, 3946182, 4042110, 4590306, 5010882, 6931390, 7003962, 7067622, 7195806, 7455630, 9349410, 10696170, 11092230
Offset: 1
Keywords
Examples
6 is a term since there are exactly 4 integers x for which phi(x)=6, namely 7, 9, 14, and 18.
Links
- Max Alekseyev, PARI scripts for various problems (see invphi.gp there).
- Andre Contiero, and Davi Lima, On the distribution of totients 2 mod. 4, arXiv:1803.01396 [math.NT], 4 Mar 2018.
- André Contiero, and Davi Lima, 2-Adic Stratification of Totients, arXiv:2005.05475 [math.NT], 2020.
Programs
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PARI
isok(m) = ((m%4)==2) && istotient(m) && (#invphi(m)==4);