A274792 - OEIS

A274792

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.

3, 5, 5, 663569, 3031329797, 17479880417, 1855418882807417, 2640138520272677

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

EXAMPLE

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.

CROSSREFS

KEYWORD

nonn,more

AUTHOR

EXTENSIONS

a(7)-a(8) from Dmitry Petukhov, Jul 07 2016

STATUS

approved