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A087638 Number of lunar primes with <= n digits. 4
0, 18, 99, 1638, 22095, 264312, 3159111, 36694950, 418286661 (list; graph; refs; listen; history; text; internal format)
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 (#{n-digit 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

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Last modified June 13 11:39 EDT 2021. Contains 344992 sequences. (Running on oeis4.)