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A104094 Largest prime <= 9^n. 1
7, 79, 727, 6553, 59029, 531383, 4782961, 43046623, 387420479, 3486784393, 31381059607, 282429536453, 2541865828309, 22876792454939, 205891132094623, 1853020188851807, 16677181699666513, 150094635296999111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..1046

FORMULA

a(n) = 9^n - A013604(2*n) = A001019(n) - A013604(2*n), n > 0. A.H.M. Smeets, Aug 12 2019

MAPLE

f:= n -> prevprime(9^n):

map(f, [$1..30]); # Robert Israel, Aug 12 2019

PROG

(PARI) g(n, b) = for(x=0, n, print1(precprime(b^x)", "))

CROSSREFS

Cf. A013604.

Largest prime <= b^n: 2^n-A013603(n), 3^n-A013604(n), 4^n-A013606(n), 5^n-A013605(n), 6^n-A013607(n), 7^n-A013608(n), 8^n-A013603(3*n), 10^n-A033874(n).

Sequence in context: A201475 A079911 A003545 * A220382 A036950 A127890

Adjacent sequences:  A104091 A104092 A104093 * A104095 A104096 A104097

KEYWORD

easy,nonn

AUTHOR

Cino Hilliard, Mar 03 2005

STATUS

approved

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Last modified January 18 00:56 EST 2022. Contains 350410 sequences. (Running on oeis4.)