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 A045493 #13 Feb 16 2025 08:32:38 %S A045493 2,11,29,31,41,43,53,73,83,97,113,131,137,139,149,173,179,181,193,211, %T A045493 227,241,251,257,263,269,281,317,337,347,349,359,367,389,431,433,449, %U A045493 463,467,479,487,503,521,541,557,563,569,571,577,587,593,599,647,659 %N A045493 Unfortunate primes - primes that are not Fortunate numbers. %C A045493 Complement of A046066 in the primes. - _Charles R Greathouse IV_, Sep 06 2012 %D A045493 Martin Gardner, "The Last Recreations", chapter 12 discusses Fortunate numbers. %H A045493 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FortunatePrime.html">Fortunate Prime</a> %Y A045493 Cf. A005235, A046066. %K A045493 nonn %O A045493 1,1 %A A045493 _Jud McCranie_