id:A092205 - OEIS Search Results

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Number of units in the imaginary quadratic field Q[Sqrt[ -n]].

+0
4

4, 2, 6, 4, 2, 2, 2, 2, 4, 2, 2, 6, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 6, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 6, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Sequence of n such that a(n)=2 gives A092206; a(n)=4 gives A000290; a(n)=6 gives A033428 - Marc LeBrun (mlb(AT)well.com), Apr 12 2006`
	LINKS	`Eric Weisstein's World of Mathematics, Unit`
	EXAMPLE	`For n=1, the units are +/-1, +/-i.` `For n=2, the units are +/-1, +/-w, +/-w^2, where w is a cube root of unity.`
	CROSSREFS	`Cf. A092206, A000290, A033482.` `Sequence in context: A097362 A129131 A097467 this_sequence A059853 A136527 A138614` `Adjacent sequences: A092202 A092203 A092204 this_sequence A092206 A092207 A092208`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com), Feb 24, 2004`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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