OFFSET

2,2

COMMENTS

LINKS

Peter J. C. Moses, Table of n, a(n) for n = 2..5001

Vladimir Shevelev, Peter J. C. Moses, Constellations of primes generated by twin primes, arXiv:1610.03385 [math.NT], 2016.

FORMULA

a(n)=2 if and only if prime(n+1) - prime(n) >=8.

CROSSREFS

KEYWORD

nonn

AUTHOR

Vladimir Shevelev and Peter J. C. Moses, Oct 22 2016

STATUS

approved