id:A098903 - OEIS Search Results

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Odd numbers whose number of distinct prime factors is also odd.

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3, 5, 7, 9, 11, 13, 17, 19, 23, 25, 27, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, 67, 71, 73, 79, 81, 83, 89, 97, 101, 103, 105, 107, 109, 113, 121, 125, 127, 131, 137, 139, 149, 151, 157, 163, 165, 167, 169, 173, 179, 181, 191, 193, 195, 197, 199, 211, 223, 227, 229 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`This will also contain all odd primes.`
	EXAMPLE	`25 is a member of sequence because 25 is odd and number of distinct prime factors of 25 i.e. 1 is also odd.`
	CROSSREFS	`Cf. A001221.` `Sequence in context: A165468 A112372 A082916 this_sequence A061345 A080429 A050150` `Adjacent sequences: A098900 A098901 A098902 this_sequence A098904 A098905 A098906`
	KEYWORD	`easy,nonn`
	AUTHOR	`Shyam Sunder Gupta (guptass(AT)rediffmail.com), Oct 14 2004`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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