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 A027661 #12 Jul 08 2025 17:54:00 %S A027661 0,414,732,0,236,449,646,828,0,162,317,464,606,742,873,0,123,243,359, %T A027661 472,583,690,796,899,0,99,196,292,385,477,568,657,745,831,916,0,83, %U A027661 164,245,325,403,481,557,633,708,782,856,928,0 %N A027661 Fractional part of decimal expansion of sqrt(n) to 3 places. %D A027661 L. J. Comrie, Chambers's Shorter Six-Figure Mathematical Tables, Chambers, Edinburgh, 1950, Table VIII. %H A027661 Alois P. Heinz, <a href="/A027661/b027661.txt">Table of n, a(n) for n = 1..10000</a> %p A027661 a:= n-> round(1000*frac(evalf(sqrt(n)))): %p A027661 seq(a(n), n=1..100); # _Alois P. Heinz_, Oct 16 2013 %t A027661 Round[FractionalPart[Sqrt[Range[100]]]*1000] (* _Paolo Xausa_, May 02 2024 *) %K A027661 nonn,base %O A027661 1,2 %A A027661 _N. J. A. Sloane_