A091165 Number of primes of the form 30k + 1 less than 10^n.

0, 2, 18, 152, 1189, 9807, 83003, 719984, 6355189, 56878661, 514751823, 4700968833, 43258135129, 400617521018, 3730570864031, 34904791369020, 327944640767252, 3092494271127481, 29257203438929873

Offset

1,2

Links

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

Crossrefs

Cf. A091165 + A091166 + A091167 + A091168 + A091169 + A091170 + A091171 + A091172 +3 (for 2, 3 & 5) = A006880.

Sequence in context: A091170 A207319 A361961 * A363568 A191814 A380936

Adjacent sequences: A091162 A091163 A091164 * A091166 A091167 A091168

Keyword

nonn,more

Author

Robert G. Wilson v, Jan 12 2004

Extensions

a(11)-a(13) from Hiroaki Yamanouchi, Oct 14 2014

a(14)-a(19) from Benjamin Chaffin, Jun 02 2026

Status

approved