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 A177801 #26 Dec 09 2020 01:12:44
%S A177801 2,3,5,7,8,12,16,20,23,25,26,30,31,32,34,38,39,40,41,42,44
%N A177801 Record lengths of chains of consecutive evil primes, starting with A177748(n).
%C A177801 In contrast to the sequence of all positive integers, where the length of every chain of consecutive evil numbers cannot exceed 2, we conjecture that for the sequence of primes such length is not bounded with growth of n.
%o A177801 (PARI) {l=0;r=0; forprime( p=1, default(primelimit), if( bittest( norml2(binary(p)),0), l>r & print1(r=l ", "); l & l=0, l++))} \\ _M. F. Hasler_, Dec 12 2010
%Y A177801 Cf. A177800 (odious version), A177748, A177798, A000069, A001969, A027697, A027699.
%K A177801 nonn,base,more
%O A177801 1,1
%A A177801 _Vladimir Shevelev_, Dec 12 2010
%E A177801 Extended by _D. S. McNeil_, Dec 12 2010
%E A177801 a(18)-a(21) from _Amiram Eldar_, Dec 09 2020