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 A175347 #12 Mar 30 2012 17:26:31 %S A175347 140737488355201,36028797018963841,10141204801825835211973625642881, %T A175347 11150372599265311570767859136324180752990081 %N A175347 Primes in A176303. %C A175347 The next term is too large to be displayed here. To extend the sequence, use A169716 to obtain the exponents n. %C A175347 a(1)..a(6) are 2^n-127 for n = 47, 55, 103, 143, 391, 2807; see A169716. %F A175347 a(n) = 2^A169716(n)-127. %Y A175347 Cf. A176303, A169716. %K A175347 nonn %O A175347 1,1 %A A175347 _Zak Seidov_, Apr 18 2010