A051420 Numbers k such that A000081(k) is prime.

3, 10, 15, 343, 387, 1087, 2981, 96761

Offset

1,1

Comments

A000081(2981) = O(10^1400) is only a probably prime. No more terms < 6000.

No more terms < 40000. - Vaclav Kotesovec, Jul 07 2020

A000081(96761) is a probable prime. No other terms < 100000. - Mathieu Gouttenoire, Oct 08 2021

Links

Table of n, a(n) for n=1..8.

Crossrefs

Cf. A000081, A119642, A185667, A336039.

Sequence in context: A370437 A259877 A182334 * A367257 A092827 A087904

Adjacent sequences: A051417 A051418 A051419 * A051421 A051422 A051423

Keyword

nonn,more

Author

David Broadhurst

Extensions

a(8) from Mathieu Gouttenoire, Oct 08 2021

Status

approved