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A063163 Composite numbers which in base 7 contain their largest proper factor as a substring. +0
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49, 77, 91, 119, 133, 161, 203, 217, 259, 287, 301, 329, 343, 371, 413, 427, 469, 497, 511, 539, 551, 553, 581, 623, 637, 679, 707, 721, 749, 763, 791, 833, 847, 889, 917, 931, 959, 973, 989, 1001, 1043, 1057, 1099, 1127, 1141, 1169, 1183, 1211, 1253 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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