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 A172374 #5 Jun 15 2013 15:01:08 %S A172374 2,278,1826,4498070,2645182700 %N A172374 The first number generating n primes through the concatenation of numbers increasing in minimal increments in the quickest way. %C A172374 Analogous to A152396 with increments replacing decrements. %e A172374 278279 and 278279280281 are prime and no number <278 gives primes when treated similarly. Concatenation of 2, 4, 8, 10, and 14 numbers give primes beginning with 2645182700. %Y A172374 A152396 %K A172374 base,nonn %O A172374 1,1 %A A172374 _James G. Merickel_, Feb 01 2010