id:A105694 - OEIS Search Results

Search: id:A105694

Displaying 1-1 of 1 results found.

page 1

10^n-10^(n-2).

+0
1

1, 10, 99, 990, 9900, 99000, 990000, 9900000, 99000000, 990000000, 9900000000, 99000000000, 990000000000, 9900000000000, 99000000000000, 990000000000000, 9900000000000000, 99000000000000000, 990000000000000000 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Apply the Riordan array (1-x,x/(1+x)) to 11^n.`
	FORMULA	`G.f.: (1-x^2)/(1-10x); a(0)=1, a(1)=10, a(n)=10^n-10^(n-2), n>1.`
	CROSSREFS	`Sequence in context: A129542 A081109 A004189 this_sequence A000456 A138365 A145644` `Adjacent sequences: A105691 A105692 A105693 this_sequence A105695 A105696 A105697`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 17 2005`

page 1

Search completed in 0.002 seconds

Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research