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 A027664 #9 Jul 08 2025 17:54:08 %S A027664 10000000,14142136,17320508,20000000,22360680,24494897,26457513, %T A027664 28284271,30000000,31622777,33166248,34641016,36055513,37416574, %U A027664 38729833,40000000,41231056,42426407,43588989,44721360,45825757,46904158,47958315,48989795,50000000,50990195 %N A027664 a(n)/10000000 gives sqrt(n) to 7 places. %p A027664 lprint(round(evalf(10000000*sqrt(n)))); %o A027664 (Python) %o A027664 from math import isqrt %o A027664 def A027664(n): return (m:=isqrt(k:=n*10**14))+int(k-m*(m+1)>=1) # _Chai Wah Wu_, Jul 31 2022 %K A027664 nonn,base %O A027664 1,1 %A A027664 _N. J. A. Sloane_