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 A354534 #21 Jan 21 2025 09:05:00
%S A354534 2,1022,295147905179352825854,
%T A354534 348449143727040986586495598010130648530942
%N A354534 Even terms in A354525 that are not twice the Mersenne primes (A000668).
%C A354534 Terms in A354533 that are not twice the Mersenne primes. Note that all twice the Mersenne primes are in A354533.
%F A354534 a(n) = 2*(2^A354532(n) - 1) = 2*A354537(n).
%e A354534 See A354532.
%o A354534 (PARI) lista(nn,{lim=256},{lim_p=1<<32}) = for(n=1, nn, if(isA354532(n,lim,lim_p), print1(2*(2^n-1), ", "))) \\ See A354532 for the function isA354532
%Y A354534 Cf. A006530, A354525, A354532, A354533, A354537.
%K A354534 nonn,hard
%O A354534 1,1
%A A354534 _Jianing Song_, Aug 16 2022