id:A046446 - OEIS Search Results

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Composites whose prime factors contain only odd digits.

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1, 9, 15, 21, 25, 27, 33, 35, 39, 45, 49, 51, 55, 57, 63, 65, 75, 77, 81, 85, 91, 93, 95, 99, 105, 111, 117, 119, 121, 125, 133, 135, 143, 147, 153, 155, 159, 165, 169, 171, 175, 177, 185, 187, 189, 195, 209, 213, 217, 219, 221, 225, 231, 237, 243, 245, 247, 255 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`E.g. 247 = 13 * 19 -> 1,3 and 9 are odd digits.`
	CROSSREFS	`Sequence in context: A067800 A155474 A100819 this_sequence A046350 A046337 A046315` `Adjacent sequences: A046443 A046444 A046445 this_sequence A046447 A046448 A046449`
	KEYWORD	`nonn,easy,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Jul 15 1998.`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research