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A217198
A sequence of odd primes p such that 2p-1 is prime and no p is equal to any 2q-1 with q in the sequence.
1
3, 7, 31, 37, 97, 139, 157, 199, 211, 229, 271, 307, 331, 337, 367, 379, 439, 499, 547, 577, 601, 607, 619, 691, 727, 811
OFFSET
1,1
COMMENTS
Sequence used in conjunction with A001259 in the referenced articles.
It is not clear that this sequence is correct -- it certainly does not match the title. See A217199 for the correct version. - T. D. Noe, Sep 28 2012
LINKS
A. Schinzel and Andrzej Wakulicz, Sur l'équation phi(x+k)=phi(x), I., Acta Arith. 4 (1958), 181-184.
A. Schinzel and Andrzej Wakulicz, Sur l'équation phi(x+k)=phi(x). II. Acta Arith. 5 1959 425-426.
CROSSREFS
KEYWORD
nonn
AUTHOR
Michel Marcus, Sep 27 2012
STATUS
approved