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 A231575 #40 Jul 25 2024 05:49:49 %S A231575 4,5,7,9,25,29,49,79,1613,15205 %N A231575 Indices of primes in A001590. %C A231575 a(11) > 2*10^5. %F A231575 A001590(a(n)) = A231574(n). - _Arthur O'Dwyer_, 24 Jul 2024 %o A231575 (PARI) v=[1,0,1]; for(n=4,1e4, if(ispseudoprime(t=v[1]+v[2]+v[3]), print1(n", ")); v=[v[2],v[3],t]) \\ _Charles R Greathouse IV_, Nov 18 2013 %Y A231575 Cf. A001590, A231574, A000213, A056816, A157611. %K A231575 nonn,more %O A231575 1,1 %A A231575 _Robert Price_, Nov 18 2013 %E A231575 Name clarified by _Arthur O'Dwyer_, Jul 24 2024