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 A209987 #5 Mar 30 2012 18:58:16 %S A209987 0,0,3,22,30,46,66,90,106,154,170,210,250,298,322,402,434,498,546,618, %T A209987 650,770,810,898,978,1058,1106,1250,1298,1410,1490,1610,1674,1874, %U A209987 1938,2034,2130,2274,2346,2586,2650 %N A209987 (A209986)/8. %C A209987 See A210000 for a guide to related sequences. %t A209987 (See the Mathematica section at A209981.) %Y A209987 Cf. A210000. %K A209987 nonn %O A209987 0,3 %A A209987 _Clark Kimberling_, Mar 17 2012