id:A103461 - OEIS Search Results

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(-10)^n+1-0^n.

+0
1

1, -9, 101, -999, 10001, -99999, 1000001, -9999999, 100000001, -999999999, 10000000001, -99999999999, 1000000000001, -9999999999999, 100000000000001, -999999999999999, 10000000000000001, -99999999999999999, 1000000000000000001, -9999999999999999999 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+10x^2)/((1-x)(1+10x)); a(n)=sum{k=0..n, binomial(n, k)0^(k(n-k))(-10)^k}.`
	CROSSREFS	`Sequence in context: A092936 A056002 A060150 this_sequence A101563 A007133 A083452` `Adjacent sequences: A103458 A103459 A103460 this_sequence A103462 A103463 A103464`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Feb 07 2005`

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

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