%I #29 Oct 28 2021 02:28:21
%S 3,10,15,343,387,1087,2981,96761
%N Numbers k such that A000081(k) is prime.
%C A000081(2981) = O(10^1400) is only a probably prime. No more terms < 6000.
%C No more terms < 40000. - _Vaclav Kotesovec_, Jul 07 2020
%C A000081(96761) is a probable prime. No other terms < 100000. - _Mathieu Gouttenoire_, Oct 08 2021
%Y Cf. A000081, A119642, A185667, A336039.
%K nonn,more
%O 1,1
%A _David Broadhurst_
%E a(8) from _Mathieu Gouttenoire_, Oct 08 2021
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