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Search: id:A071394
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| A071394 |
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Numbers n divisible by pi(n) [A057809] with prime pi(n); i.e. largest prime factor of n equals pi(n). |
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+0
2
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| 4, 6, 33, 335, 355, 3073, 8408, 64690, 481044, 1304693, 1304719, 3524318, 3524654, 9559785, 9559905, 70115803, 189963234, 189963918, 514278263, 1394194660, 3779856591, 10246935974, 75370122456, 204475052725, 204475053325
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OFFSET
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1,1
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EXAMPLE
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pi(8408) = 1051, and 8408 = 2.2.2.'1051'.
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MATHEMATICA
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c = 0; lpf[n_] := If[ PrimeQ[n], c++; n, Transpose[ FactorInteger[n]][[1, -1]]]; Do[ If[ lpf[n] == c, Print[n]], {n, 2, 10^7}]
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CROSSREFS
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Cf. A000720, A006530.
Sequence in context: A068402 A078250 A087299 this_sequence A137021 A092187 A092765
Adjacent sequences: A071391 A071392 A071393 this_sequence A071395 A071396 A071397
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jun 12 2002
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EXTENSIONS
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Edited and extended by Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 13 2002
More terms from Hans Havermann (pxp(AT)rogers.com), Jul 02 2002
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