id:A165951 - OEIS Search Results

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If the nth prime is denoted by p(n) then a(n) = (Sum of the quadratic non-residues of p(n) - Sum of the quadratic residues of p(n)) / p(n)

+0
6

0, 0, 0, 1, 1, 0, 0, 1, 3, 0, 3, 0, 0, 1, 5, 0, 3, 0, 1, 7, 0, 5, 3, 0, 0, 0, 5, 3, 0, 0, 5, 5, 0, 3, 0, 7, 0, 1, 11, 0, 5, 0, 13, 0, 0, 9, 3, 7, 5, 0, 0, 15, 0, 7, 0, 13, 0, 11, 0, 0, 3, 0, 3, 19, 0, 0, 3, 0, 5, 0, 0, 19, 9, 0, 3, 17, 0, 0, 0, 0, 9, 0, 21, 0, 15, 5, 0, 0, 0, 7, 7, 25, 7, 9, 3, 21, 0, 0 (list; graph; listen)

	OFFSET	`1,9`
	COMMENT	`Also, a(n) = (sum (floor (j^2/p(n))), j = 1:p(n)-1) - floor ((p(n)-2)(p(n)-1)/3) for n >= 3.`
	CROSSREFS	`a(3:) = A125616 - A076410.` `Sequence in context: A030208 A126598 A127802 this_sequence A094901 A030220 A055240` `Adjacent sequences: A165948 A165949 A165950 this_sequence A165952 A165953 A165954`
	KEYWORD	`nonn`
	AUTHOR	`Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Oct 01 2009`
	EXTENSIONS	`a(1:2) added and cross-reference section modified by Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Oct 07 2009` `Comment corrected by Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Oct 17 2009` `Comment corrected by Christopher Hunt Gribble (chris.eveswell(AT)virgin.net), Oct 29 2009`

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

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