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 A243629 #19 Jun 13 2014 11:54:18 %S A243629 1,22,7,42,33,4,40 %N A243629 Fibonacci's solution to x^3 + 2x^2 + 10x = 20. %C A243629 Fibonacci attempted to solve x^3 + 2x^2 + 10x = 20 and managed to approximate an answer in base 60 with this sequence without a calculator or computer, but he gave a(6) as 40 instead of the correct answer of 38 (see A159990). Unfortunately, Fibonacci did not explain how he calculated this sequence, so it is not possible to explore the precision to a greater degree. %D A243629 Alfred S. Posamentier & Ingmar Lehmann, The (Fabulous) Fibonacci Numbers. New York: Prometheus Books (2007): 21. %e A243629 x = 1 + 22/60 + 7/60^2 + 42/60^3 + 33/60^4 + 4/60^5 + 40/60^6. Then x^3 + 2x^2 + 10x = 20.0000000006719323... %Y A243629 Cf. A159990 shows the sequence corrected. %K A243629 nonn %O A243629 0,2 %A A243629 _Jason Chabora_, Jun 10 2014