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A051018
Numbers that are 2-persistent but not 3-persistent.
10
1023456789, 1023456879, 1023457689, 1023457869, 1023458679, 1023458769, 1023465789, 1023465879, 1023467589, 1023467859, 1023468579, 1023468759, 1023475689, 1023475869, 1023476589, 1023476859, 1023478569, 1023478659
OFFSET
1,1
COMMENTS
A number n is k-persistent iff all of {n, 2n,..., kn} are pandigital (in the sense of A171102).
LINKS
Eric Weisstein's World of Mathematics, Persistent Number
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
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: A302096 A171102 A050278 * A020667 A154566 A371469
KEYWORD
nonn,base
EXTENSIONS
Definition corrected by Franklin T. Adams-Watters, Jan 09 2012
STATUS
approved