A091171 Number of primes of the form 30k + 23 less than 10^n.

0, 3, 21, 155, 1198, 9840, 83152, 720363, 6356436, 56882425, 514755769, 4700994974, 43258230232

Offset

1,2

Links

Table of n, a(n) for n=1..13.

Crossrefs

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

Sequence in context: A163472 A229809 A074575 * A226560 A026333 A370170

Adjacent sequences: A091168 A091169 A091170 * A091172 A091173 A091174

Keyword

nonn,more

Author

Robert G. Wilson v, Jan 12 2004

Extensions

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

Status

approved