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 A207982 #17 Sep 10 2018 13:37:13 %S A207982 2,3,5,11,11,11,23,23,23,31,43,43,43,43,59,59,59,59,107,149,151,151, %T A207982 151,151,163,163,163,163,163,163,163,163,163,277,277,277,277,401,401, %U A207982 457,457,457,457,457,457,457,479,479,479,479,479,479,479,479,479,479 %N A207982 Least m>1 such that all central binomial coefficients C(2k,k), k<=n, are pairwise not congruent mod m. %H A207982 Chai Wah Wu, <a href="/A207982/b207982.txt">Table of n, a(n) for n = 1..5000</a> %H A207982 Z. W. Sun, <a href="https://listserv.nodak.edu/cgi-bin/wa.exe?A2=NMBRTHRY;df748f41.1202">A function taking only prime values</a>, Number Theory list, Feb 21 2012 %o A207982 (PARI) m=2; for(n=1,99, forstep(nn=n,2,-1,for(k=1,nn-1,(binomial(nn*2,nn)-binomial(2*k,k))%m&next; m++; nn=n+1;next(2))); print1(m", ")) %K A207982 nonn %O A207982 1,1 %A A207982 _M. F. Hasler_, Feb 22 2012