id:A106250 - OEIS Search Results

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Expansion of (1-x+x^2+x^3)/(1-x-x^5+x^6).

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1, 0, 1, 2, 2, 3, 2, 3, 4, 4, 5, 4, 5, 6, 6, 7, 6, 7, 8, 8, 9, 8, 9, 10, 10, 11, 10, 11, 12, 12, 13, 12, 13, 14, 14, 15, 14, 15, 16, 16, 17, 16, 17, 18, 18, 19, 18, 19, 20, 20, 21, 20, 21, 22, 22, 23, 22, 23, 24, 24, 25, 24, 25, 26, 26, 27, 26, 27, 28, 28, 29, 28, 29, 30, 30, 31, 30 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`G.f.: (1-x+x^2+x^3)/(1-x-x^5+x^6)=(1+x^2+2x^3+2x^4+x^5+2x^6+x^7)/(1-x^5)^2; a(n)=sum{k=0..n, -mu(k mod 5)}.`
	CROSSREFS	`Cf. A008611.` `Sequence in context: A127095 A074712 A087735 this_sequence A029248 A085916 A048621` `Adjacent sequences: A106247 A106248 A106249 this_sequence A106251 A106252 A106253`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 27 2005`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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