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A087638
Number of lunar primes with <= n digits.
4
0, 18, 99, 1638, 22095, 264312, 3159111, 36694950, 418286661
OFFSET
1,2
COMMENTS
Partial sums of A087636. - M. F. Hasler, Nov 15 2018
LINKS
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]
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 (#{n-digit primes}).
Sequence in context: A377207 A221911 A263999 * A231144 A259231 A376877
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