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A030637
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Numbers with 19 divisors.
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13
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262144, 387420489, 3814697265625, 1628413597910449, 5559917313492231481, 112455406951957393129, 14063084452067724991009, 104127350297911241532841, 3244150909895248285300369, 210457284365172120330305161, 699053619999045038539170241
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| 18th powers of primes. The n-th number with p divisors is equal to the n-th prime raised to power p-1, where p is prime. - Omar E. Pol (info(AT)polprimos.com), May 06 2008
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LINKS
| R. J. Mathar, Table of n, a(n) for n = 1..1000
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FORMULA
| a(n)=A000040(n)^(19-1)=A000040(n)^(18). - Omar E. Pol (info(AT)polprimos.com), May 06 2008
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MATHEMATICA
| Prime[Range[18]]^18 (* From Vladimir Joseph Stephan Orlovsky, May 05 2011 *)
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CROSSREFS
| Cf. A000040, A030634, A030635, A030636.
Sequence in context: A016905 A017700 A010806 * A183818 A016965 A017037
Adjacent sequences: A030634 A030635 A030636 * A030638 A030639 A030640
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KEYWORD
| nonn,easy
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AUTHOR
| Jeff Burch (jmburch(AT)osprey.smcm.edu)
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EXTENSIONS
| a(6) corrected, Mar 26 2007
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