A091164 Number of primes of the form 12k + 11 less than 10^n.

0, 6, 42, 307, 2397, 19654, 166214, 1440453, 12712194, 113765537, 1029515489, 9401996233, 86516413434, 801235464897, 7461143097257, 69809585701838, 655889292235101, 6184988571325455, 58514406974899459

Offset

1,2

Links

Table of n, a(n) for n=1..19.

Crossrefs

Cf. A091161 + A091162 + A091163 + A091164 +2 (for 2 & 3) = A006880.

Sequence in context: A127628 A111602 A299916 * A004982 A093388 A162968

Adjacent sequences: A091161 A091162 A091163 * A091165 A091166 A091167

Keyword

nonn

Author

Robert G. Wilson v, Jan 12 2004

Extensions

a(11)-a(19) from Benjamin Chaffin, Jun 02 2026

Status

approved