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 A299799 Carmichael numbers (A002997) that are Chebyshev pseudoprimes (A175530). 2
 443372888629441, 582920080863121, 39671149333495681, 842526563598720001, 2380296518909971201, 3188618003602886401, 33711266676317630401, 54764632857801026161, 122762671289519184001, 361266866679292635601, 4208895375600667752001, 7673096805497432749441 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Odd composite integer n is in this sequence if n == 1 or p (mod (p^2-1)/2) for every prime p|n. No other terms below 10^22. LINKS Table of n, a(n) for n=1..12. CROSSREFS Intersection of A002997 and A175530. Contains A175531 as a subsequence. Sequence in context: A128769 A261150 A181392 * A175531 A186914 A172665 Adjacent sequences: A299796 A299797 A299798 * A299800 A299801 A299802 KEYWORD nonn,hard,more AUTHOR Max Alekseyev, Feb 19 2018 EXTENSIONS a(9) from Daniel Suteu confirmed and a(10) added by Max Alekseyev, Dec 16 2020 a(11)-a(12) from Max Alekseyev, Apr 21 2024 STATUS approved

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Last modified June 18 02:31 EDT 2024. Contains 373468 sequences. (Running on oeis4.)