id:A091731 - OEIS Search Results

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Number of irreducible elements of Z[sqrt(-5)] of norm n (counting a and -a once only).

+0
2

0, 0, 0, 0, 1, 1, 2, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 2, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 (list; graph; listen)

	OFFSET	`0,7`
	REFERENCES	`D. Cox, Primes of the form x^2+ny^2, Wiley, 1989.` `A. Frohlich and M. J. Taylor, Algebraic number theory, Cambridge university press, 1991.`
	FORMULA	`See A091730.`
	CROSSREFS	`Sequence in context: A116597 A165664 A019263 this_sequence A127648 A132681 A132825` `Adjacent sequences: A091728 A091729 A091730 this_sequence A091732 A091733 A091734`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Boddington (psb(AT)maths.warwick.ac.uk), Feb 02 2004`

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Last modified March 16 18:11 EDT 2010. Contains 173532 sequences.

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