id:A163301 - OEIS Search Results

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Sum_{x=nth even nonprime..nth odd nonprime}-x*(-1)^x

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	OFFSET	`1,2`
	COMMENT	`Here nth even nonprime = A163300(n), nth odd nonprime = A014076(n) and A163300 U A0140076 = A141468.`
	FORMULA	`a(n)=sum_{x=nth A163300..nth A014076}-x*(-1)^x`
	EXAMPLE	`a(1)=-0(-1)^0-1(-1)^1=0+1=1; a(2)=-4(-1)^4-5(-1)^5-6(-1)6-7(-1)^7-8(-1)^8-9(-1)^9=-4+5-6+7-8+9=3.`
	CROSSREFS	`Cf. A014076, A141468, A163300.` `Sequence in context: A142340 A131979 A101496 this_sequence A008508 A036593 A086674` `Adjacent sequences: A163298 A163299 A163300 this_sequence A163302 A163303 A163304`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 26 2009`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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