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Numbers k such that A049614(k) + A000040(k) is prime.
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%I #16 Aug 10 2024 09:29:12

%S 1,4,6,7,8,13,17,18,21,41,86,101,144,368,1232,1713,2431,2897,6122,

%T 6240,6876

%N Numbers k such that A049614(k) + A000040(k) is prime.

%o (PARI) is(k) = ispseudoprime(prod(i=1, k, i^!isprime(i)) + prime(k)); \\ _Jinyuan Wang_, Jan 08 2021

%Y Cf. A000040, A034386, A049614, A078745.

%K nonn,more

%O 1,2

%A _Jason Earls_, Dec 21 2002

%E a(17)-a(18) from _Jinyuan Wang_, Jan 08 2021

%E a(19)-a(21) from _Michael S. Branicky_, Aug 10 2024