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A051018
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Numbers that are 2-persistent but not 3-persistent.
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9
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1023456789, 1023456879, 1023457689, 1023457869, 1023458679, 1023458769, 1023465789, 1023465879, 1023467589, 1023467859, 1023468579, 1023468759, 1023475689, 1023475869, 1023476589, 1023476859, 1023478569, 1023478659
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| A number n is k-persistent iff all of {n, 2n,..., kn} are pandigital (in the sense of A171102).
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LINKS
| Eric Weisstein's World of Mathematics, Persistent Number
Hans Havermann, Table of n, a(n) for n = 1..1000
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PROG
| (PARI) is_A051018(n, k=3)=10>#Set(Vec(Str(k*n))) & !while(k--, 9<#Set(Vec(Str(k*n)) | return) \\ M. F. Hasler, Jan 10 2012
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CROSSREFS
| Cf. A171102 (pandigital), A204047 (smallest n-persistent), A051264 (1-persistent), A051019 (3-persistent), A051020 (4-persistent), A204096 (5-persistent), A204097 (6-persistent).
Sequence in context: A061604 A050278 A171102 * A020667 A154566 A180489
Adjacent sequences: A051015 A051016 A051017 * A051019 A051020 A051021
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KEYWORD
| nonn,base
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com)
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EXTENSIONS
| Definition corrected by Franklin T. Adams-Watters, Jan 09 2012
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