A177798 First primes of record chains of consecutive primes such that all of them are odious (A027697)

2, 7, 167, 199, 6271, 12227, 168713, 579907, 5937157, 6829751, 8059943, 66858173, 167857663, 661416709, 2322857987, 12012698381, 14641587607, 26304771553, 49671709081, 1244930533403, 1922085626009

Offset

1,1

Comments

The corresponding record lengths are: 1,3,6,9,11,15, etc. (A177800).

Links

Table of n, a(n) for n=1..21.

Prog

(PARI) back(p, k)=while(k--, p=precprime(p-1)); precprime(p-1)
r=s=0; forprime(p=2, 1e9, if(hammingweight(p)%2, s++, if(s>r, r=s; print1(back(p, r)", ")); s=0)) \\ Charles R Greathouse IV, Mar 29 2013

Crossrefs

Cf. A177748 (evil version), A000069, A001969, A027697, A027699, A177800.

Sequence in context: A182974 A005345 A174366 * A077746 A236810 A159034

Adjacent sequences: A177795 A177796 A177797 * A177799 A177800 A177801

Keyword

nonn,base,more

Author

Vladimir Shevelev, Dec 12 2010

Extensions

More terms from D. S. McNeil, Dec 12 2010

a(20)-a(21) from Amiram Eldar, Dec 09 2020

Status

approved