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A032640 Numbers n such that n concatenated with itself is a lucky number. +0
3
3, 9, 21, 23, 51, 59, 63, 71, 75, 87, 89, 99, 105, 111, 117, 123, 129, 135, 143, 147, 153, 171, 173, 177, 191, 201, 237, 243, 255, 263, 285, 305, 309, 317, 327, 357, 363, 369, 371, 387, 389, 393, 431, 443, 459, 465, 467, 495, 497, 513, 521, 533, 561, 567, 573 (list; graph; listen)
OFFSET

1,1

CROSSREFS

Cf. A000959, A032650.

Sequence in context: A109612 A032668 A050839 this_sequence A127174 A044055 A029542

Adjacent sequences: A032637 A032638 A032639 this_sequence A032641 A032642 A032643

KEYWORD

nonn,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.

EXTENSIONS

More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 24 2002

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.


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