A080680 - OEIS

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A080680

Integer part of squareroot of n-th prime == 1 (modulo 4).

2, 3, 4, 5, 6, 6, 7, 7, 8, 9, 9, 10, 10, 10, 11, 12, 12, 13, 13, 13, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 22, 22, 23, 23, 23, 24, 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 27, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(n)^2 < A002330(n+2)^2 + A002331(n+2)^2 < a(n+1)^2.`
	FORMULA	`a(n) = A000196(A002144(n)).`
	CROSSREFS	`Sequence in context: A025544 A121856 A132172 * A005376 A196362 A195879` `Adjacent sequences: A080677 A080678 A080679 * A080681 A080682 A080683`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 02 2003`

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Last modified February 14 23:53 EST 2012. Contains 205689 sequences.