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 A190499 #8 Jul 01 2017 08:25:56 %S A190499 1,4,6,11,16,18,21,23,28,30,33,35,40,42,45,47,50,52,57,59,62,64,69,71, %T A190499 74,76,79,81,86,88,91,93,98,100,103,105,110,112,115,117,120,122,127, %U A190499 129,132,134,139,141,144,146,149,151,156,158,161,163,168,170,173,175,180,185,187,190,192,197,199,202,204,209,211,214,216,219 %N A190499 Positions of 2 in A190496. %C A190499 See A190496. %H A190499 G. C. Greubel, <a href="/A190499/b190499.txt">Table of n, a(n) for n = 1..1000</a> %t A190499 (See A190496.) %Y A190499 Cf. A190496. %K A190499 nonn %O A190499 1,2 %A A190499 _Clark Kimberling_, May 11 2011