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 A290240 #5 Aug 03 2017 11:36:53 %S A290240 5,5,9,75,862,9903,101030,1028263 %N A290240 The number of unitary untouchable numbers <= 10^n. %C A290240 The unitary version of A057978. a(5)-a(8) were taken from the paper by Pomerance and Yang. %H A290240 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. %Y A290240 Cf. A057978, A063948. %K A290240 nonn,more %O A290240 1,1 %A A290240 _Amiram Eldar_, Jul 24 2017