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 A185952 #19 Jul 23 2017 21:44:46
%S A185952 2,10,130,2210,64090,2371330,97224530,5152900090,314326905490,
%T A185952 22945864100770,2042181904968530,198091644781947410,
%U A185952 20007256122976688410,2180790917404459036690,246429373666703871145970
%N A185952 Partial products of A002313, the primes that are 1 or 2 (mod 4).
%C A185952 Product of the first n primes which are natural primes which are not Gaussian primes. Product of the first n primes congruent to 1 or 2 modulo 4. Product of the first n primes of form x^2+y^2. Product of the first n primes p such that -1 is a square mod p. Factors of primorials (A002110) not divisible by natural primes which are also Gaussian primes.
%C A185952 Essentially twice A006278.
%H A185952 G. C. Greubel, <a href="/A185952/b185952.txt">Table of n, a(n) for n = 1..300</a>
%F A185952 a(n) = Product_{i=1..n} A002313(i) = 2 * Product_{i=1..n} {p in A000040 but p not in A002145} = Product_{i=1..n} {A000040 intersection A042963}.
%e A185952 a(10) = 2 * 5 * 13 * 17 * 29 * 37 * 41 * 53 * 61 * 73 = 22945864100770.
%t A185952 Rest@ FoldList[#1*#2 &, 1, Select[ Prime@ Range@ 30, Mod[#, 4] != 3 &]] (* _Robert G. Wilson v_ *)
%o A185952 (PARI) pp(v)=my(t=1); vector(#v,i,t*=v[i])
%o A185952 pp(select(n->n%4<3, primes(20))) \\ _Charles R Greathouse IV_, Apr 21 2015
%Y A185952 Cf. A000040, A002110, A002313, A042963, A103222.
%K A185952 nonn,easy
%O A185952 1,1
%A A185952 _Jonathan Vos Post_, Feb 07 2011
%E A185952 Terms corrected by _Robert G. Wilson v_, Feb 11 2011