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 A131585 #7 Feb 03 2025 13:08:32
%S A131585 2,25,250,2501,25010,250108,2501085,25010857,250108575,2501085758,
%T A131585 25010857580,250108575801,2501085758014,25010857580145,
%U A131585 250108575801456,2501085758014568,25010857580145688,250108575801456887
%N A131585 Concatenation of first n numbers of the decimal expansion of imaginary part of 3rd nontrivial zero of Riemann zeta function.
%H A131585 <a href="/index/Z#zeta_function">Index entries for zeta function</a>.
%t A131585 Module[{nn=30,zz3},zz3=RealDigits[Im[ZetaZero[3]],10,nn][[1]];Table[FromDigits[Take[zz3,n]],{n,nn}]] (* _Harvey P. Dale_, Feb 03 2025 *)
%Y A131585 See A002410 and A065452 for more information.
%K A131585 easy,nonn,base,less
%O A131585 0,1
%A A131585 _Omar E. Pol_, Sep 13 2007