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 A291466 #6 Oct 18 2017 04:44:40 %S A291466 30,230,1309 %N A291466 First of the smallest n consecutive sphenic numbers A007304. %C A291466 Every 4th consecutive number is divisible by 4 = 2*2 and therefore is not sphenic, so a(n) does not exist for n >= 4. %H A291466 Wikipedia, <a href="https://en.wikipedia.org/wiki/Sphenic_number">Sphenic number</a> %e A291466 30 = 2*3*5 is the first spheric number, so a(1) = 30. %e A291466 The first case of two consecutive sphenic numbers is 230 = 2*5*23 and 231 = 3*7*11, so a(2) = 230. %e A291466 The first case of three is 1309 = 7*11*17, 1310 = 2*5*131, and 1311 = 3*19*23, so a(3) = 1309. %Y A291466 Cf. A007304. %K A291466 nonn,fini,full %O A291466 1,1 %A A291466 _Jonathan Sondow_, Oct 17 2017