A063933 - OEIS

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A063933

Difference between n and the average of largest prime less than or equal to n and smallest prime greater than or equal to n.

0, 0, 0, 0, 0, 0, -1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, -1, 0, 1, 0, -2, -1, 0, 1, 2, 0, 0, 0, -2, -1, 0, 1, 2, 0, -1, 0, 1, 0, 0, 0, -1, 0, 1, 0, -2, -1, 0, 1, 2, 0, -2, -1, 0, 1, 2, 0, 0, 0, -2, -1, 0, 1, 2, 0, -1, 0, 1, 0, 0, 0, -2, -1, 0, 1, 2, 0, -1, 0, 1, 0, -2, -1, 0, 1, 2, 0, -3, -2, -1, 0, 1, 2, 3, 0, -1, 0, 1, 0, 0, 0, -1, 0, 1, 0, 0, 0, -1, 0, 1, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`2,23`
	LINKS	`Harry J. Smith, Table of n, a(n) for n=2,...,1000`
	FORMULA	`a(n) = n-(A007917(n)+A007918(n))/2 = n-A063932(n). a(n) = 0 for numbers in A063934 (i.e. in A000040 or A024675).`
	EXAMPLE	`a(10) = 10-(11-7)/2 = 1; a(11) = 11-(11+11)/2 = 0.`
	PROG	`(PARI) { for (n=2, 1000, write("b063933.txt", n, " ", n - (precprime(n) + nextprime(n))/2) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Sep 03 2009]`
	CROSSREFS	`Sequence in context: A066438 A051126 A168120 * A085860 A178665 A170958` `Adjacent sequences: A063930 A063931 A063932 * A063934 A063935 A063936`
	KEYWORD	`sign`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Aug 21 2001`

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Last modified February 15 12:24 EST 2012. Contains 205785 sequences.