id:A074389 - OEIS Search Results

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a(n)=GCD[w, sigma(n),Phi(n)]=GCD[A000005(n), A000010(n),n].

+0
4

1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 4, 1, 2, 1, 1, 1, 3, 1, 2, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 6, 1, 4, 3, 2, 1, 4, 1, 1, 1, 2, 1, 6, 1, 8, 1, 2, 1, 4, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 1, 3, 1, 2, 1, 4, 1, 6, 1, 2, 1, 2, 1, 4, 1, 2, 1, 4, 1, 6, 1, 4, 1, 2, 1, 4, 1, 1, 3, 1, 1, 2, 1, 2, 3 (list; graph; listen)

	OFFSET	`1,6`
	MATHEMATICA	`Table[Apply[GCD, {w, DivisorSigma[1, w], EulerPhi[w]}], {w, 1, 128}]`
	CROSSREFS	`Cf. A000005, A000010, A073815, A050399, A009195, A009194.` `Sequence in context: A138010 A167204 A104306 this_sequence A051119 A159269 A009191` `Adjacent sequences: A074386 A074387 A074388 this_sequence A074390 A074391 A074392`
	KEYWORD	`easy,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Aug 23 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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