A036693 - OEIS

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A036693

Number of Gaussian integers z=a+bi satisfying n-1<|z|<=n.

1, 4, 8, 16, 20, 32, 32, 36, 48, 56, 64, 60, 64, 88, 84, 96, 88, 104, 108, 120, 128, 116, 144, 136, 140, 168, 160, 168, 164, 176, 192, 180, 208, 200, 216, 228, 200, 240, 220, 264, 248, 236, 264, 264, 288, 284, 264, 296, 292, 312 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`a(n)/n ~ 2*pi; a(10^2)=660, a(10^3)=6392, a(10^4)=62952, a(10^5)=628520, a(10^6)=6281404. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 13, 2002`
	LINKS	`Index entries for Gaussian integers and primes`
	FORMULA	`a(n) = A000328(n)-A000328(n-1). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 13, 2002`
	CROSSREFS	`Sequence in context: A031399 A076488 A092259 * A181471 A129370 A194271` `Adjacent sequences: A036690 A036691 A036692 * A036694 A036695 A036696`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 14 07:16 EST 2012. Contains 205589 sequences.