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 A076583 #2 Oct 02 2013 15:47:20 %S A076583 25200,61776,195000,248160,270480,295296,306936,320400,346528,373680, %T A076583 400960,446040,460320,461280,499500,662976,664128,749700,818560, %U A076583 902496,903840,946000,1037520,1155960,1185030,1664400,1721440,1873080,1888596 %N A076583 Triangular numbers which are 9-almost primes. %e A076583 a(1)=25200, 25200 is a triangular number and 25200=2*2*2*2*3*3*5*5*7 i.e. is a product of 9 prime factors so is 9-almost prime. %K A076583 base,easy,nonn %O A076583 1,1 %A A076583 _Shyam Sunder Gupta_, Oct 19 2002