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 A290242 #7 Aug 03 2017 11:37:03 %S A290242 1,8,98,963,10527,110786,1128160,11355049,113482572,1129598504 %N A290242 The number of noncototient numbers <= 10^n. %C A290242 a(5)-a(8) were taken from the paper by Pomerance and Yang. %C A290242 a(9)-a(10) were taken from the paper Pollack and Pomerance. %H A290242 Carl Pomerance and Hee-Sung Yang, <a href="http://doi.org/10.1090/S0025-5718-2013-02775-5">Variant of a theorem of Erdős on the sum-of-proper-divisors function</a>, Mathematics of Computation, Vol. 83, No. 288 (2014), pp. 1903-1913. %H A290242 Paul Pollack and Carl Pomerance, <a href="http://dx.doi.org/10.1090/btran/10">Some problems of Erdős on the sum-of-divisors function</a>, Transactions of the American Mathematical Society, Series B Vol. 3, No. 1 (2016), pp. 1-26. %Y A290242 Cf. A005278. %K A290242 nonn,more %O A290242 1,2 %A A290242 _Amiram Eldar_, Jul 24 2017