A293563 - OEIS

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A293563

a(n) = k is a number such that A007535(k), the smallest pseudoprime to base k ( > k), is the n-th Carmichael number.

355, 348, 765, 1092, 2035, 4457, 6855, 8253, 12820, 22270, 33687, 39171, 46860, 52087, 54027, 64917, 91703, 97860, 115971, 144291, 154717, 172267, 222477, 259098, 278967, 290820, 304878, 320929, 368305, 383656, 402333, 459571, 489481, 504165, 532378, 624325

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OFFSET

1,1

COMMENTS

Pairs of consecutive terms that are not monotonic (a(n) > a(n+1)): (355, 348), (624325, 611289), (778947, 761178), ... corresponding to the Carmichael numbers (1105, 561), (656601, 658801), (825265, 838201), ...

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..150

EXAMPLE

a(1) = 355 since 355 is the least k such that A007535(k) = 561 = A002997(1), the first Carmichael number.

a(2) = 348 since 348 is the least k such that A007535(k) = 1105 = A002997(2), the second Carmichael number.

CROSSREFS

Cf. A002997, A007535, A293512.

Sequence in context: A157668 A374696 A250157 * A241960 A221450 A232298

Adjacent sequences: A293560 A293561 A293562 * A293564 A293565 A293566

KEYWORD

nonn

AUTHOR

Amiram Eldar, Oct 12 2017

STATUS

approved