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Record lengths of chains of consecutive evil primes, starting with A177748(n).
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%I #26 Dec 09 2020 01:12:44

%S 2,3,5,7,8,12,16,20,23,25,26,30,31,32,34,38,39,40,41,42,44

%N Record lengths of chains of consecutive evil primes, starting with A177748(n).

%C 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 (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 Cf. A177800 (odious version), A177748, A177798, A000069, A001969, A027697, A027699.

%K nonn,base,more

%O 1,1

%A _Vladimir Shevelev_, Dec 12 2010

%E Extended by _D. S. McNeil_, Dec 12 2010

%E a(18)-a(21) from _Amiram Eldar_, Dec 09 2020