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Search: id:A000015
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| A000015 |
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Smallest prime power >= n. |
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+0
7
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| 1, 2, 3, 4, 5, 7, 7, 8, 9, 11, 11, 13, 13, 16, 16, 16, 17, 19, 19, 23, 23, 23, 23, 25, 25, 27, 27, 29, 29, 31, 31, 32, 37, 37, 37, 37, 37, 41, 41, 41, 41, 43, 43, 47, 47, 47, 47, 49, 49, 53, 53, 53, 53, 59, 59, 59, 59, 59, 59, 61, 61, 64, 64, 64, 67, 67, 67, 71, 71, 71, 71, 73
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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David W. Wilson, Table of n, a(n) for n = 1..10000
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MATHEMATICA
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Insert[Table[m:=n; While[Not[Length[FactorInteger[m]]==1], m++ ]; m, {n, 2, 100}], 1, 1] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 17 2006
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PROGRAM
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(PARI) a(n)=if(n<1, 0, while(matsize(factor(n))[1]>1, n++); n)
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CROSSREFS
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Cf. A000961, A031218.
Sequence in context: A076034 A034152 A114707 this_sequence A122411 A117174 A022473
Adjacent sequences: A000012 A000013 A000014 this_sequence A000016 A000017 A000018
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KEYWORD
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nonn
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AUTHOR
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njas
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EXTENSIONS
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More terms from Michael Somos, Jul 16 2002
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