id:A136401 - OEIS Search Results

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a(n)=3a(n-1)-4a(n-2)+6a(n-3)-4a(n-4).

+0
1

0, 0, 0, 1, 3, 5, 9, 21, 45, 85, 165, 341, 693 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`a(n)=-(1/3)+(1/6)2^n+(1/12)[Isqrt(2)]^n+(1/12)[ -I*sqrt(2)]^n, with n>=0 and I=sqrt(-1) - Paolo P. Lava (ppl(AT)spl.at), Jun 09 2008`
	CROSSREFS	`Sequence in context: A053662 A050355 A069927 this_sequence A129787 A125517 A089636` `Adjacent sequences: A136398 A136399 A136400 this_sequence A136402 A136403 A136404`
	KEYWORD	`nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Mar 30 2008`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.