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 A092839 #19 Feb 16 2025 08:32:53
%S A092839 3,4,6,10,216
%N A092839 Indices of primes in A001003.
%C A092839 a(6), if it exists, is > 1.5*10^6. - _Robert Price_, Apr 16 2014
%H A092839 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/SuperCatalanNumber.html">Super Catalan Number</a>
%H A092839 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>
%o A092839 (PARI) s(m)= { if (m==1, return(a1)); if (m==2, return(a2)); r = (3*(2*m - 3)*a2 - (m - 3)*a1)/m; a1=a2; a2=r; return(r); }
%o A092839 { a1=1; a2=1; n=0; for (m=1, 300, a=s(m); if (isprime(a), n++; print1(m, ", "))); } \\ _Harry J. Smith_, Jun 21 2009
%Y A092839 Cf. A001003, A092840.
%K A092839 nonn,more
%O A092839 1,1
%A A092839 _Eric W. Weisstein_, Mar 07 2004