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 A086655 #20 Apr 21 2025 02:38:46
%S A086655 1,3,25,245,32065,400023,68635477,930138521,178987624513,
%T A086655 518401146543811,7506908923471953,23596358977508462295,
%U A086655 5180299766448679532059,77180849825857621779893,17294692982395428197325697,59174764703889164618206676203,206412709386903552066428869508701
%N A086655 (binomial(2*p,p)-2)/(2*p) where p runs through the primes.
%H A086655 Amiram Eldar, <a href="/A086655/b086655.txt">Table of n, a(n) for n = 1..263</a>
%F A086655 a(n) = A022553(prime(n)).
%t A086655 Table[(Binomial[2*p, p] - 2)/(2*p), {p, Prime[Range[18]]}] (* _Amiram Eldar_, Apr 21 2025 *)
%Y A086655 Cf. A000984, A022553.
%K A086655 nonn
%O A086655 1,2
%A A086655 _Benoit Cloitre_, Sep 11 2003
%E A086655 Typo in definition corrected by _Vladimir Shevelev_, Sep 05 2010