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 A336581 #25 Aug 31 2020 04:35:26 %S A336581 5,7,13,17,61 %N A336581 Mersenne exponents whose corresponding prime can be expressed as the sum of at least two consecutive primes. %C A336581 127 is a term. %H A336581 Carlos Rivera, <a href="https://www.primepuzzles.net/puzzles/puzz_456.htm">Puzzle 456. Mersenne Primes as a sum of consecutive primes</a>, The Prime Puzzles and Problems Connection. %e A336581 5 is a term because 2^5-1 = 7 + 11 + 13. %e A336581 17 is a term because 2^17-1 = 43669 + 43691 + 43711. %o A336581 (PARI) isok(m) = my(p=2^m-1); isprime(p) && isA050936(p); %Y A336581 Cf. A000043 (Mersenne exponents), A000668, A050936, A067377. %K A336581 nonn,more %O A336581 1,1 %A A336581 _Michel Marcus_, Aug 30 2020