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URL: https://oeis.org/A037064

⇱ A037064 - OEIS

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A037064
a(n)-th prime is the smallest prime containing exactly n 6's.
9
1, 18, 121, 859, 15226, 54070, 1071206, 3933314, 34614430, 309084622, 2792083255, 61496476037, 1214237371612, 5255429125063, 105341326636887, 458846460486827, 15441107727480784, 16660543186177748, 832868428561305574, 1494006786965549890, 14206605445888164436, 135418222271099812357
OFFSET
0,2
LINKS
Andrew R. Booker, The Nth Prime Page.
Kim Walisch, primecount, Fast prime counting function library.
FORMULA
a(n) = A000720(A037065(n)). - Amiram Eldar, Jul 20 2025
MATHEMATICA
(* see A037065 for f *) PrimePi[ Table[ f[n, 6], {n, 1, 12}]]
KEYWORD
nonn,base,hard
AUTHOR
Patrick De Geest, Jan 04 1999
EXTENSIONS
One more terms from Hans Havermann, Jun 16 2001
a(0)=1 prepended by Sean A. Irvine, Dec 06 2020
a(13)-a(21) calculated using Kim Walisch's primecount and added by Amiram Eldar, Jul 20 2025
STATUS
approved