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 A221794 #20 Feb 16 2025 08:33:19 %S A221794 1,7,42,263,1965,15282,126826 %N A221794 Number of primes of the form (x+1)^3 - x^3 with x <= 10^n. %C A221794 Cuban primes are primes that are the difference of two consecutive cubes, p = (x+1)^3 - x^3 (A002407). They are also primes of the form 3k(k+1) + 1, where values for k+1 are in A002504. %H A221794 Ed Pegg, Jr., <a href="https://mathworld.wolfram.com/CubanPrime.html">MathWorld: Cuban Prime</a> %H A221794 Wikipedia, <a href="http://en.wikipedia.org/wiki/Cuban_prime">Cuban prime</a> %Y A221794 Cf. A002407, A002504, A003215, A113478 (number of cuban primes < 10^n). %K A221794 nonn %O A221794 0,2 %A A221794 _Vladimir Pletser_, Jan 25 2013