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 A333742 Numbers k such that lambda(k) = lambda(k+2), where lambda is the Carmichael lambda function (A002322). 1
 4, 6, 7, 180, 208, 427, 1183, 1330, 1404, 1480, 1584, 1651, 1672, 2013, 2695, 2715, 3256, 3439, 5250, 5668, 5698, 5950, 5955, 7600, 12243, 13392, 13715, 14768, 22263, 22878, 23347, 24804, 26100, 30500, 32940, 43648, 45870, 46205, 52548, 54481, 59148, 59780, 62719 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Amiram Eldar, Table of n, a(n) for n = 1..5000 EXAMPLE 4 is a term since lambda(4) = lambda(6) = 2. MATHEMATICA Select[Range[10^4], CarmichaelLambda[#] == CarmichaelLambda[# + 2] &] CROSSREFS Cf. A001494, A002322. Sequence in context: A102133 A192121 A012760 * A107648 A004786 A263357 Adjacent sequences: A333739 A333740 A333741 * A333743 A333744 A333745 KEYWORD nonn AUTHOR Amiram Eldar, Apr 03 2020 STATUS approved

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Last modified September 23 10:17 EDT 2023. Contains 365544 sequences. (Running on oeis4.)