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A177798 First primes of record chains of consecutive primes such that all of them are odious (A027697) 3
2, 7, 167, 199, 6271, 12227, 168713, 579907, 5937157, 6829751, 8059943, 66858173, 167857663, 661416709, 2322857987, 12012698381, 14641587607, 26304771553, 49671709081, 1244930533403, 1922085626009 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 12 15:33 EDT 2021. Contains 343825 sequences. (Running on oeis4.)