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 A175533 #14 May 17 2024 06:15:20 %S A175533 3,7,19,55,139,859,2119,112999,333679,10040119,15363619,548687179, %T A175533 16632374359,5733638351299,14360489685499,433098704482699, %U A175533 44258681327079259,5009018648920510999 %N A175533 Duplicate of A115760. %C A175533 Or, for i <> j, (a(i) + a(j))/2 are primes. %C A175533 From a(5)=139 onward, all terms are 19 (mod 20). %C A175533 Is sequence finite? %C A175533 Is this a duplicate of A115760? - _R. J. Mathar_, Jul 22 2010 %C A175533 Yes, the terms are all 3 (mod 4), just as A175533. - _Don Reble_, Aug 17 2021 %Y A175533 Cf. A115760, A175532. %K A175533 dead %O A175533 1,1 %A A175533 _Zak Seidov_, Jun 12 2010 %E A175533 More terms from _Don Reble_, Aug 17 2021