A074389 - OEIS

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A074389

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

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; refs; listen; history; internal format)

	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 * A051119 A159269 A186728` `Adjacent sequences: A074386 A074387 A074388 * A074390 A074391 A074392`
	KEYWORD	`easy,nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Aug 23 2002`

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Last modified February 14 07:40 EST 2012. Contains 205597 sequences.