id:A076655 - OEIS Search Results

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Numerator of a(n), where for n > 2, a(n)=-1/a(n-1)+1/a(n-2), a(1)=1, a(2)=2.

+0
2

1, 2, 1, -3, 8, -25, 267, -11408, 4063825, -61874069763, 376863853335803168, -33029401504744904404673707225 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n>2)=-1/a(n-1)+1/a(n-2), a(1)=1, a(2)=2, a(n)->-(-1)^n sqrt(2).`
	EXAMPLE	`a(3)=-1/a(2)+1/a(1)=-1/2+1=1/2, therefore in the sequence, 3rd term is 1.`
	CROSSREFS	`Cf. A074935.` `Sequence in context: A137307 A078045 A057300 this_sequence A101486 A086606 A076112` `Adjacent sequences: A076652 A076653 A076654 this_sequence A076656 A076657 A076658`
	KEYWORD	`sign,frac`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Oct 24 2002`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.