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 A118456 #16 Aug 20 2019 04:25:31
%S A118456 2,4,12,60,300,2100,14700,161700,1778700,19565700,215222700,
%T A118456 2797895100,36372636300,618334817100,10511691890700,178698762141900,
%U A118456 3037878956412300,57719700171833700,1096674303264840300,25223508975091326900,580140706427100518700,13343236247823311930100
%N A118456 a(n) = Product_{k=1..n} P(k), where P(k) is the smallest prime >= k.
%H A118456 Michael De Vlieger, <a href="/A118456/b118456.txt">Table of n, a(n) for n = 1..448</a>
%e A118456 a(5)=300 because the smallest primes that are not smaller than 1,2,3,4 and 5 are 2,2,3,5 and 5, respectively, having product 2*2*3*5*5=300.
%p A118456 a:=n->product(nextprime(k-1),k=1..n): seq(a(n),n=1..22); # _Emeric Deutsch_, Apr 29 2006
%t A118456 FoldList[Times, Table[NextPrime[k - 1], {k, 22}]] (* _Michael De Vlieger_, Aug 21 2017 *)
%o A118456 (PARI) a(n) = prod(k=1, n, nextprime(k)); \\ _Michel Marcus_, Aug 20 2019
%Y A118456 Cf. A118455, A002110, A034386.
%K A118456 easy,nonn
%O A118456 1,1
%A A118456 _Leroy Quet_, Apr 28 2006
%E A118456 More terms from _Emeric Deutsch_ and _Jonathan Vos Post_, Apr 29 2006