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 A068358 #19 Sep 06 2022 15:34:50
%S A068358 0,8,10,13,15,20,25,27,30,32,35,37,40,42,45,47,50,52,57,62,67,72,77,
%T A068358 82,87,92,97,102,107,112,117,122,127,132,137,142,147,152,157,162,167,
%U A068358 172,177,182,187,190,192,195,197,200,202,205,207,210,212,215,217,220,222
%N A068358 Numbers k such that the first digit of binomial(2k,k) is 1.
%H A068358 David A. Corneth, <a href="/A068358/b068358.txt">Table of n, a(n) for n = 1..10001</a>
%t A068358 Join[{0},Select[Range[250],IntegerDigits[Binomial[2#,#]][[1]]==1&]] (* _Harvey P. Dale_, Dec 31 2017 *)
%Y A068358 Cf. A068359.
%K A068358 easy,nonn,base
%O A068358 1,2
%A A068358 _Benoit Cloitre_, Feb 28 2002
%E A068358 a(1) = 0 inserted by _Stefano Spezia_, Sep 06 2022