id:A106251 - OEIS Search Results

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Expansion of (1-x+x^2+x^3+x^5)/(1-x-x^6+x^7).

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1, 0, 1, 2, 2, 3, 4, 3, 4, 5, 5, 6, 7, 6, 7, 8, 8, 9, 10, 9, 10, 11, 11, 12, 13, 12, 13, 14, 14, 15, 16, 15, 16, 17, 17, 18, 19, 18, 19, 20, 20, 21, 22, 21, 22, 23, 23, 24, 25, 24, 25, 26, 26, 27, 28, 27, 28, 29, 29, 30, 31, 30, 31, 32, 32, 33, 34, 33, 34, 35, 35, 36, 37, 36, 37, 38 (list; graph; listen)

	OFFSET	`0,4`
	FORMULA	`G.f.: (1+x^2+2x^3+2x^4+3x^5+2x^6+3x^7+2x^8+x^9+x^10)/(1-x^6)^2; a(n)=sum{k=0..n, -mu(k mod 6)}.`
	CROSSREFS	`Cf. A008611, A106249, A106250.` `Sequence in context: A064514 A112342 A063712 this_sequence A134478 A051162 A122872` `Adjacent sequences: A106248 A106249 A106250 this_sequence A106252 A106253 A106254`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 27 2005`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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