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A172057 Primes p such that either p-5/2-+1/2 is prime. 0
7, 13, 19, 31, 43, 61, 73, 103, 109, 139, 151, 181, 193, 199, 229, 241, 271, 283, 313, 349, 421, 433, 463, 523, 571, 601, 619, 643, 661, 811, 823, 829, 859, 883, 1021, 1033, 1051, 1063, 1093, 1153, 1231, 1279, 1291, 1303, 1321, 1429, 1453, 1483, 1489, 1609 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Greater of twin primes where twin primes of the form 6*k+1.

LINKS

Table of n, a(n) for n=1..50.

FORMULA

a(n)=A006512(n+1).

CROSSREFS

Cf. A006512.

Sequence in context: A242190 A053458 A040058 * A173176 A216550 A267803

Adjacent sequences:  A172054 A172055 A172056 * A172058 A172059 A172060

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Jan 24 2010

EXTENSIONS

Corrected (829 and 859 inserted) R. J. Mathar, May 02 2010

STATUS

approved

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Last modified May 31 19:40 EDT 2020. Contains 334748 sequences. (Running on oeis4.)