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A293512 Numbers n such that the smallest pseudoprime ( > n ) to base n, A007535(n) is a Carmichael number. 1
348, 355, 358, 383, 388, 427, 448, 455, 478, 479, 485, 490, 491, 497, 499, 508, 509, 511, 515, 520, 521, 533, 535, 541, 545, 547, 551, 553, 556, 557, 559, 560, 679, 708, 759, 765, 777, 796, 807, 808, 822, 828, 838, 839, 847, 862, 891, 906, 928, 931, 933, 951 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..52.

EXAMPLE

348 is the sequence since A007535(348) = 1105 is a Carmichael number.

MATHEMATICA

carmichaelQ[n_] := Divisible[n - 1, CarmichaelLambda[n]] && ! PrimeQ[n];

f[n_] := Block[{k = n}, While[GCD[n, k] > 1 || PrimeQ[k] || PowerMod[n, k - 1, k] != 1, j = k++]; k]; Select[Range[1000], carmichaelQ[f[#]] &] (* after Robert G.Wilson v at A090086 *)

CROSSREFS

Cf. A002997, A007535.

Sequence in context: A185713 A264384 A323999 * A275237 A129642 A304837

Adjacent sequences:  A293509 A293510 A293511 * A293513 A293514 A293515

KEYWORD

nonn

AUTHOR

Amiram Eldar, Oct 12 2017

STATUS

approved

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Last modified August 19 08:37 EDT 2019. Contains 326115 sequences. (Running on oeis4.)