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

Offset: 1

Author

Amiram Eldar, Oct 12 2017

Keywords

• nonn

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), ...

Examples

			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.
		

Links

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

Crossrefs

Cf. A002997, A007535, A293512.