

A087638


Number of lunar primes with <= n digits.


4




OFFSET

1,2


COMMENTS

Partial sums of A087636.  M. F. Hasler, Nov 15 2018


LINKS

Table of n, a(n) for n=1..9.
D. Applegate, C program for lunar arithmetic and number theory [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic"  the old name was too depressing]
D. Applegate, M. LeBrun and N. J. A. Sloane, Dismal Arithmetic, arxiv:1107.1130 [math.NT], July 2011. [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic"  the old name was too depressing]
Index entries for sequences related to dismal (or lunar) arithmetic


PROG

(PARI) A087638(n)=sum(k=2, n, A087636(k)) \\ M. F. Hasler, Nov 15 2018


CROSSREFS

Cf. A087062 (lunar product), A087097 (lunar primes), A087636 (#{ndigit primes}).
Sequence in context: A008920 A221911 A263999 * A231144 A259231 A064604
Adjacent sequences: A087635 A087636 A087637 * A087639 A087640 A087641


KEYWORD

nonn,base,more


AUTHOR

Marc LeBrun and N. J. A. Sloane, Oct 26 2003


EXTENSIONS

a(6)a(9) from David Applegate, Nov 07 2003


STATUS

approved



