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 A048191 Let (u1,u2) be successive untouchable numbers such that phi(u1) = phi(u2) = k; sequence gives values of k. 4
 32, 144, 192, 312, 240, 592, 672, 760, 648, 936, 1600, 864, 1560, 1224, 1872, 2160, 2688, 1920, 2088, 1920, 3312, 3732, 3760, 2640, 3984, 4240, 4272, 2880, 4248, 6432, 5976, 5112, 7760, 5280, 7932, 4320, 8968, 9000, 6176, 7680, 10224, 7560, 12072, 12432, 12552 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..4309 (terms 1..81 from Michel Marcus) FORMULA a(n) = A000010(A048189(n)) = A000010(A048190(n)). - Amiram Eldar, Sep 23 2022 EXAMPLE 32 is a term since 96 and 120 are successive untouchable numbers and phi(96) = phi(120) = 32. 144 is a term since 292 and 304 are successive untouchable numbers and phi(292) = phi(304) = 144. CROSSREFS Cf. A000010, A005114, A048188, A048189, A048190. Sequence in context: A221597 A159763 A100164 * A363531 A224041 A188839 Adjacent sequences: A048188 A048189 A048190 * A048192 A048193 A048194 KEYWORD nonn AUTHOR Naohiro Nomoto EXTENSIONS Offset changed to 1 and more terms from Michel Marcus, Jun 08 2015 STATUS approved

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Last modified September 11 02:28 EDT 2024. Contains 375813 sequences. (Running on oeis4.)