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 A059903 #6 Oct 14 2022 17:57:58 %S A059903 1,4,18,1,16,324,72030,162,1,64,5832,2916,372027810,10588410,1458,1, %T A059903 256,104976,1036385881030500,26244,9421689827550,4946387159463750, %U A059903 1556496270,13122,1,1024,1889568,2542277241000,76256028326940,236196 %N A059903 Periodic part of continued fraction for sqrt(n), encoded by raising successive primes to the terms. If sqrt(n)=c0+[c1,c2,c3...] then a(n)=2^c1*3^c2*5^c3*... %C A059903 Could be made less gigantic by omitting final terms in continued fraction, which are always 2*c0. %F A059903 a(n) = A059900(A059904(n)). %e A059903 sqrt(14) = 3+[1,2,1,6] so a(14) = 2^1*3^2*5^1*7^6 = 10588410. %Y A059903 Cf. A059904, A059900, A003285. %K A059903 easy,nonn %O A059903 1,2 %A A059903 _Marc LeBrun_, Feb 07 2001 %E A059903 Offset corrected by _Sean A. Irvine_, Oct 14 2022