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 A047987 #7 Mar 30 2012 17:26:42 %S A047987 3976733,8053483,9942523,10197427,15126557,28623773,32269037,34438387, %T A047987 36627413,39593803,47812747,49120843,55066867,69909667,78068443, %U A047987 80024213,83402597,89512483,97799033,101652883,106675637,116621213,120317683,128241067 %N A047987 Integers n such that A047988(n)=4. %D A047987 Thomas Kantke, Mathematische Unterhaltungen, Spectrum der Wissenschaft, April 1993, pp. 11-13. %Y A047987 Cf. A047836, A047984-A047988. %K A047987 nonn %O A047987 1,1 %A A047987 Thomas Kantke (bytes.more(AT)ibm.net) %E A047987 More terms from _Max Alekseyev_, Jun 13 2011