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A274792
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a(n) = smallest prime p(1) in a symmetrical constellation of n consecutive twin primes: p(1), p(1)+2, ..., p(n), p(n)+2.
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4
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..8.
N. Makarova and C. Rivera, Symmetrical compositions of consecutive twin primes.
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EXAMPLE
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The list of two consecutive twin primes (5, 7, 11, 13) is symmetrical because 5+13 = 7+11. Thus a(2) = 5.
The list of three consecutive twin primes (5, 7, 11, 13, 17, 19) is symmetrical because 5+19 = 7+17 = 11+13. Thus a(3) = 5.
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CROSSREFS
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Cf. A077800.
Sequence in context: A231809 A186969 A111950 * A243589 A178255 A154467
Adjacent sequences: A274789 A274790 A274791 * A274793 A274794 A274795
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KEYWORD
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nonn,more
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AUTHOR
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Natalia Makarova, Jul 07 2016
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EXTENSIONS
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a(7)-a(8) from Dmitry Petukhov, Jul 07 2016
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STATUS
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approved
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