A306997 Number of primes q < prime(n), such that 6*prime(n) + q is prime.

0, 0, 0, 1, 2, 2, 3, 2, 3, 5, 4, 6, 6, 5, 3, 5, 6, 7, 10, 10, 9, 7, 8, 12, 10, 9, 9, 10, 13, 10, 8, 11, 12, 12, 14, 12, 14, 16, 17, 11, 16, 17, 16, 14, 15, 17, 17, 14, 18, 17, 18, 21, 21, 20, 20, 17, 18, 19, 20, 18, 17, 21, 23, 23, 17, 24, 26, 23, 25, 24, 23, 25, 24, 24, 29, 25, 26, 26, 28, 28, 26, 33, 30, 25, 25, 30, 31, 25, 25, 31, 23, 29, 30, 30, 30

Offset

1,5

Comments

Conjecture: a(n) > 0 for all n >= 4. - Dmitry Kamenetsky, Mar 18 2019

Links

Table of n, a(n) for n=1..95.

Crossrefs

Cf. A306995, A306996.

Sequence in context: A080092 A164738 A126225 * A056160 A106245 A129568

Adjacent sequences: A306994 A306995 A306996 * A306998 A306999 A307000

Keyword

nonn

Author

Dmitry Kamenetsky, Mar 18 2019

Status

approved