id:A155090 - OEIS Search Results

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Composites n without even prime factor in composite(n).

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4, 8, 12, 15, 21, 26, 30, 33, 35, 38, 40, 44, 46, 49, 55, 58, 63, 66, 68, 70, 77, 81, 84, 86, 88, 90, 92, 94, 100, 102, 106, 108, 110, 112, 116, 118, 121, 123, 126, 129, 131, 134, 136, 140, 142, 144, 146, 150, 154, 156, 158, 160, 162 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`If n=4=composite and 33=9=composite(4), then 4=a(1). If n=8=composite and 35=15=composite(8), then 8=a(2). If n=12=composite and 3*7=21=composite(12), then=a(3), etc.`
	CROSSREFS	`Cf. A002808.` `Sequence in context: A099309 A073432 A133803 this_sequence A081747 A020647 A130702` `Adjacent sequences: A155087 A155088 A155089 this_sequence A155091 A155092 A155093`
	KEYWORD	`nonn,base`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT0rambler.ru), Jan 20 2009`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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