id:A063137 - OEIS Search Results

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Composite numbers not divisible by 2, 3 or 5 which contain their largest proper factor as a substring in base 2.

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91, 343, 407, 493, 539, 637, 893, 1001, 1189, 1309, 1343, 1403, 1643, 1681, 1771, 1859, 1961, 2527, 2717, 2783, 3059, 3151, 3179, 3223, 3451, 3703, 3731, 3773, 3887, 4063, 4199, 4459, 4579, 4669, 4823, 4913, 4991, 5291, 5453, 5491, 5719 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(7)= 19 * 47= 893: '1101111101' contains '101111' (47) and 5 < 19.`
	CROSSREFS	`Cf. A062238.` `Sequence in context: A051973 A000864 A020441 this_sequence A020218 A084319 A047696` `Adjacent sequences: A063134 A063135 A063136 this_sequence A063138 A063139 A063140`
	KEYWORD	`base,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 08 2001`
	EXTENSIONS	`Edited by frank.ellermann(AT)t-online.de, Feb 08 2002`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research