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 A090782 #4 Mar 30 2012 17:29:14 %S A090782 120,168,312,408,480,552,600,672,720,1008,1200,1800,2160,2472,2832, %T A090782 2880,3312,3672,4560,5040,5640,6120,6480,6528,7248,7320,7752,7872, %U A090782 8160,8352,8400,8712,8880,9048,9768,9960,10032,10200,10320,10488,10608,10848 %N A090782 Numbers that can be expressed as the difference of the squares of primes in just three distinct ways. %e A090782 120 = 13^2-7^2 = 17^2-13^2 = 31^2-29^2. %Y A090782 Cf. A078667, A090788, A090781. %K A090782 nonn %O A090782 1,1 %A A090782 _Ray Chandler_, Feb 14 2004