id:A097072 - OEIS Search Results

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

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1, 0, 3, 4, 11, 20, 43, 84, 171, 340, 683, 1364, 2731, 5460, 10923, 21844, 43691, 87380, 174763, 349524, 699051, 1398100, 2796203, 5592404, 11184811, 22369620, 44739243, 89478484, 178956971, 357913940, 715827883, 1431655764, 2863311531 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(n)=2*2^n/3-1/2+5(-1)^n/6; a(n)=sum{k=0..n, (2^k-1+0^k)(-1)^(n-k) }; a(n)=A001045(n+1)-A000035(n).`
	CROSSREFS	`Cf. A000975.` `Sequence in context: A060285 A025079 A036652 this_sequence A049977 A000677 A110865` `Adjacent sequences: A097069 A097070 A097071 this_sequence A097073 A097074 A097075`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 22 2004`

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

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