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 A239280 #16 Apr 29 2018 02:17:22 %S A239280 8,16,32,4096 %N A239280 Powers of 2 that are sum of prime(k) + k for some k. %C A239280 a(5) > 2^47. - _Giovanni Resta_, Mar 14 2014 %C A239280 a(5) > 2^62 if it exists. - _Chai Wah Wu_, Apr 28 2018 %e A239280 3 + prime(3) = 8 = 2^3. %e A239280 5 + prime(5) = 16 = 2^4. %e A239280 9 + prime(9) = 32 = 2^5. %e A239280 503 + prime(503) = 4096 = 2^12. %Y A239280 Cf. A014688, A064371, A073856, A107606. %K A239280 nonn,more %O A239280 1,1 %A A239280 _Zak Seidov_, Mar 14 2014