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A007416
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The minimal numbers: sequence A005179 arranged in increasing order.
(Formerly M1022)
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27
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1, 2, 4, 6, 12, 16, 24, 36, 48, 60, 64, 120, 144, 180, 192, 240, 360, 576, 720, 840, 900, 960, 1024, 1260, 1296, 1680, 2520, 2880, 3072, 3600, 4096, 5040, 5184, 6300, 6480, 6720, 7560, 9216, 10080
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| n such there is no x<n such that A000005(x)=A000005(n) - Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 28 2002
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REFERENCES
| M. E. Grost, The smallest number with a given number of divisors, Amer. Math. Monthly, 75 (1968), 725-729.
J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 86.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..1000
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PROG
| (PARI) for(s=1, 10^6, if(abs(prod(i=1, s-1, numdiv(i)-numdiv(s)))>0, print1(s, ", ")))
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CROSSREFS
| Cf. A099317, A099312, A099314, A099316, A099318.
Sequence in context: A089696 A171609 A099316 * A098895 A120453 A023995
Adjacent sequences: A007413 A007414 A007415 * A007417 A007418 A007419
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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