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 A060842 #16 Dec 09 2024 22:04:09
%S A060842 1,2,10,70,5830,61542,8074762,97909318,15564141262,35751803209918,
%T A060842 484316704740126,1275478863649106070,252697549582862416198,
%U A060842 3589806968644540547902,735944382229592689247902,2233009988826006212007799102,6997040996166222103946741339278,103007775714125517422789307317230
%N A060842 a(n) = (binomial(2*p,p)-2)/p^2 where p = prime(n).
%H A060842 Harry J. Smith, <a href="/A060842/b060842.txt">Table of n, a(n) for n = 1..100</a>
%F A060842 a(n) = A177454(n)/A000040(n). - _R. J. Mathar_, Jan 09 2017
%t A060842 Table[(Binomial[2p,p]-2)/p^2,{p,Prime[Range[20]]}] (* _Harvey P. Dale_, Mar 05 2023 *)
%o A060842 (PARI) a(n) = { my(p=prime(n)); (binomial(2*p, p) - 2)/p^2 } \\ _Harry J. Smith_, Jul 19 2009
%K A060842 nonn
%O A060842 1,2
%A A060842 _Benoit Cloitre_, Feb 13 2003