id:A143750 - OEIS Search Results

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a(n)=10^C(n,2)*(1-10^n)/9.

+0
2

0, -1, -110, -111000, -1111000000, -111110000000000, -111111000000000000000, -1111111000000000000000000000, -111111110000000000000000000000000000, -111111111000000000000000000000000000000000000 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Hankel transform of A143749.`
	FORMULA	`a(n)=-10^C(n,2)*A002275(n);`
	CROSSREFS	`Sequence in context: A135650 A097580 A139478 this_sequence A028673 A138280 A077573` `Adjacent sequences: A143747 A143748 A143749 this_sequence A143751 A143752 A143753`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Aug 30 2008`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research