id:A086462 - OEIS Search Results

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Expansion of (1+x)(1+4x)/((1-x)(1-4x)).

+0
1

1, 10, 50, 210, 850, 3410, 13650, 54610, 218450, 873810, 3495250, 13981010, 55924050, 223696210, 894784850, 3579139410, 14316557650, 57266230610, 229064922450, 916259689810, 3665038759250, 14660155037010, 58640620148050 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(0)=1, a(1)=10, a(2)=50, a(n)=5a(n-1)-4a(n-2); a(n)=10(4^n-1)/3+0^n=10A002450(n)+0^n=10A001045(2n)+0^n.`
	CROSSREFS	`Sequence in context: A051230 A008413 A006542 this_sequence A003207 A095687 A154410` `Adjacent sequences: A086459 A086460 A086461 this_sequence A086463 A086464 A086465`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 21 2003`

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

AT&T Labs Research