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 A120851 #7 Dec 19 2018 03:44:31
%S A120851 193,29989,13082761331669749
%N A120851 Numbers n such that n is prime and is equal to the product of the first k primes minus the sum of the first k primes, for some k.
%C A120851 It is in the spirit of A096345 (only for 2 consecutive primes).
%C A120851 The corresponding values of k are 4, 6, 14, 548, 1190, ... a(4) = 2.452... * 10^1691, a(5) = 1.263... x 10^4142. - _Amiram Eldar_, Dec 19 2018
%e A120851 193 = -(2+3+5+7)+(2*3*5*7) and 193 is prime.
%t A120851 tb = {}; Do[pq = -Plus @@ Prime[Range[1, k]] + Times @@ Prime[Range[1, k]]; If[PrimeQ[pq], AppendTo[tb, pq]], {k, 1, 200}]; tb
%Y A120851 Cf. A096345, A096342, A120850.
%K A120851 nonn,bref
%O A120851 1,1
%A A120851 _Carlos Alves_, Jul 08 2006
%E A120851 The next term is too large to include.