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 A127645 #6 Apr 09 2014 10:12:25 %S A127645 3,9,18,36,48,64,72,96,128,162,192,240,255,256,270,272,289,300,320, %T A127645 324,350,357,378,400,405,432,442,455,480,520,539,567,600,637,660,702, %U A127645 740,784,819,850,891,920,966,1015,1054,1104,1140,1183,1230,1275,1326,1380 %N A127645 a(n) = sum of first n terms of sequence A127644. %C A127645 a(n) divides A127646(n). %Y A127645 Cf. A127644, A127646. %K A127645 nonn %O A127645 1,1 %A A127645 _Leroy Quet_, Jan 22 2007 %E A127645 Extended by _Ray Chandler_, Jan 22 2007