id:A137150 - OEIS Search Results

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Degree of Lagrange resolvent of polynomial of composite degree.

+0
2

1, 3, 60, 1260, 6720, 90720, 9979200, 1037836800, 10897286400, 163459296000, 59281238016000, 15205637551104000, 202741834014720000, 5109094217170944000, 3231502092360622080000, 31022420086661971968000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Ratio: degree of symmetric group of composite order n divided by order metacyclic group of composite order n.`
	FORMULA	`a(n)= n!/(n EulerPhi[n]) for composite n A058161 = A137149 + A137150`
	MATHEMATICA	`a = {}; Do[If[PrimeQ[n], [null], AppendTo[a, n!/(n EulerPhi[n])]], {n, 1, 30}]; a`
	CROSSREFS	`Cf. A058161, A137149.` `Adjacent sequences: A137147 A137148 A137149 this_sequence A137151 A137152 A137153` `Sequence in context: A115490 A065889 A001084 this_sequence A081854 A085990 A036770`
	KEYWORD	`nonn`
	AUTHOR	`Artur Jasinski (grafix(AT)csl.pl), Jan 23 2008`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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