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 A087294 #7 Aug 06 2021 06:59:48 %S A087294 113,613,24421,2042221,60731221,102975601,253102501,327449641, %T A087294 722798221,2284271641,46414646521,57358506301,89249322541, %U A087294 129933236221,185045469601,215232948901,323617365541,554037063901,732039110041,2373042229801,3076710505441,3443735055601 %N A087294 Primes resulting from A087293. %e A087294 113 is in the sequence because ((prime(2)*prime(3))^2 + 1)/2 = ((3*5)^2 + 1)/2 = 113 is prime. %Y A087294 Cf. A086893, A087293. %K A087294 nonn %O A087294 1,1 %A A087294 _Ray Chandler_, Aug 31 2003 %E A087294 Offset changed to 1 and more terms from _Jinyuan Wang_, Aug 06 2021