This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A078745 #16 Aug 10 2024 14:52:10 %S A078745 6,7,8,15,23,36,93,117,121,131,150,310,433,896,1226,4439,11452,13069 %N A078745 Numbers k such that A049614(k) - A000040(k) is prime. %o A078745 (PARI) is(k) = ispseudoprime(prod(i=1, k, i^!isprime(i)) - prime(k)); \\ _Jinyuan Wang_, Jan 09 2021 %Y A078745 Cf. A000040, A034386, A049614, A078744. %K A078745 nonn,more %O A078745 1,1 %A A078745 _Jason Earls_, Dec 21 2002 %E A078745 a(16) from _Ryan Propper_, Feb 12 2007 %E A078745 a(17)-a(18) from _Michael S. Branicky_, Aug 10 2024