id:A067268 - OEIS Search Results

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Numbers n such that n and n^2+1 have the same number of distinct prime factors.

+0
1

2, 4, 12, 15, 16, 18, 22, 28, 34, 35, 38, 39, 44, 45, 46, 48, 50, 51, 52, 58, 62, 65, 68, 69, 76, 80, 82, 85, 86, 88, 92, 95, 96, 100, 104, 105, 106, 108, 118, 132, 136, 138, 141, 144, 145, 152, 158, 159, 164, 166, 171, 174, 175, 178, 188, 194, 196, 201, 202, 205 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`n such that omega(n)=omega(n^2+1)`
	CROSSREFS	`Sequence in context: A111069 A107295 A039564 this_sequence A082458 A114064 A071118` `Adjacent sequences: A067265 A067266 A067267 this_sequence A067269 A067270 A067271`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 21 2002`

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Last modified December 5 23:38 EST 2009. Contains 170428 sequences.

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