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A087638 Number of lunar primes with <= n digits. 4

%I

%S 0,18,99,1638,22095,264312,3159111,36694950,418286661

%N Number of lunar primes with <= n digits.

%C Partial sums of A087636. - _M. F. Hasler_, Nov 15 2018

%H D. Applegate, <a href="/A087061/a087061.txt">C program for lunar arithmetic and number theory</a> [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]

%H D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a>, 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]

%H <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>

%o (PARI) A087638(n)=sum(k=2,n,A087636(k)) \\ _M. F. Hasler_, Nov 15 2018

%Y Cf. A087062 (lunar product), A087097 (lunar primes), A087636 (#{n-digit primes}).

%K nonn,base,more

%O 1,2

%A Marc LeBrun and _N. J. A. Sloane_, Oct 26 2003

%E a(6)-a(9) from _David Applegate_, Nov 07 2003

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Last modified July 23 12:19 EDT 2021. Contains 346259 sequences. (Running on oeis4.)