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A087636 Number of n-digit lunar primes. 4
0, 18, 81, 1539, 20457, 242217, 2894799, 33535839, 381591711 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Although a(1) through a(6) are divisible by 9, a(7) is not.

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 [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

CROSSREFS

Cf. A087062, A087097, A087638.

Sequence in context: A214531 A271502 A235641 * A156218 A118293 A043430

Adjacent sequences:  A087633 A087634 A087635 * A087637 A087638 A087639

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 29 10:13 EDT 2017. Contains 288859 sequences.