A161757 - OEIS

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A161757

(prime(n))^2 - (nonprime(n))^2.

4, 8, 9, 13, 57, 88, 189, 217, 333, 616, 705, 1045, 1281, 1408, 1725, 2233, 2856, 3045, 3760, 4257, 4429, 5217, 5800, 6765, 8184, 8905, 9165, 9928, 10281, 11005, 14193, 15136, 16653, 17017, 19800, 20301, 22048, 23865, 24973, 26904, 28905, 29512, 33117 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Table of n, a(n) for n=1..43.`
	FORMULA	`a(n) = A000040(n)^2-A141468(n)^2 = A001248(n)-A161753(n).`
	EXAMPLE	`a(1)=4-0^2=4. a(2)=9-1^2=8. a(3)=25-4^2=9. a(4)=49-6^2=13. a(5)=121-8^2=57.`
	CROSSREFS	`Cf. A001248, A141468, A161753.` `Sequence in context: A071835 A010429 A140282 * A134376 A163408 A060299` `Adjacent sequences: A161754 A161755 A161756 * A161758 A161759 A161760`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov, Jun 18 2009`
	EXTENSIONS	`Definition condensed, 78 replaced by 88, 145 replaced by 217, 433 replaced by 333 etc. by R. J. Mathar, Jun 27 2009`
	STATUS	`approved`

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Last modified November 19 15:11 EST 2017. Contains 294936 sequences.