id:A055008 - OEIS Search Results

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GCD[Phi[x],Sigma[x]]=1, Phi=A000010, Sigma=A000203.

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1, 2, 4, 8, 9, 16, 25, 32, 36, 50, 64, 81, 100, 121, 128, 144, 225, 242, 256, 289, 324, 400, 484, 512, 529, 576, 578, 625, 729, 800, 841, 900, 1024, 1058, 1089, 1156, 1250, 1296, 1600, 1681, 1682, 1936, 2025, 2048, 2116, 2209, 2304, 2312, 2401, 2500, 2601 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`For x=484, Phi[484]=220=2.2.11.11, Sigma[484]=931=7.7.19, so GCD[220,931]=1. Powers of odd prime multiplied by a power of 2 are here.`
	CROSSREFS	`A000010, A000203.` `Sequence in context: A025611 A049439 A079931 this_sequence A046678 A046680 A113570` `Adjacent sequences: A055005 A055006 A055007 this_sequence A055009 A055010 A055011`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), May 31 2000`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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