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 A075327 #4 Dec 05 2013 19:55:37 %S A075327 4,13,19,26,34,43,49,58,64,73,79,86,94,103,109,116,124,133,139,146, %T A075327 154,163,169,178,184,193,199,206,214,223,229,238,244,253,259,266,274, %U A075327 283,289,298,304,313,319,326,334,343,349,356,364,373,379,386,394,403,409 %N A075327 Sum of n-th pair in A075325. %Y A075327 Cf. A075325, A075326. %K A075327 nonn %O A075327 1,1 %A A075327 _Amarnath Murthy_, Sep 16 2002 %E A075327 More terms from _David Wasserman_, Jan 16 2005