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Inverse of number triangle A(n,k)=if(k<=n,if(n<=2k,1/(2-0^n),0),0).

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1, 0, 2, 0, -2, 2, 0, 2, -2, 2, 0, 0, 0, -2, 2, 0, -2, 2, 0, -2, 2, 0, 0, 0, 0, 0, -2, 2, 0, 2, -2, 2, 0, 0, -2, 2, 0, 0, 0, 0, 0, 0, 0, -2, 2, 0, 0, 0, -2, 2, 0, 0, 0, -2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, -2, 2, 0, -2, 2, 0, -2, 2, 0, 0, 0, 0, -2, 2 (list; table; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Row sums are A069517 (conjecture).`
	EXAMPLE	`Triangle begins` `1,` `0, 2,` `0, -2, 2,` `0, 2, -2, 2,` `0, 0, 0, -2, 2,` `0, -2, 2, 0, -2, 2,` `0, 0, 0, 0, 0, -2, 2,` `0, 2, -2, 2, 0, 0, -2, 2,` `0, 0, 0, 0, 0, 0, 0, -2, 2,` `0, 0, 0, -2, 2, 0, 0, 0, -2, 2,` `0, 0, 0, 0, 0, 0, 0, 0, 0, -2, 2,` `0, -2, 2, 0, -2, 2, 0, 0, 0, 0, -2, 2,` `0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -2, 2` `Inverse of triangle` `1,` `0, 1/2,` `0, 1/2, 1/2,` `0, 0, 1/2, 1/2,` `0, 0, 1/2, 1/2, 1/2,` `0, 0, 0, 1/2, 1/2, 1/2,` `0, 0, 0, 1/2, 1/2, 1/2, 1/2,` `0, 0, 0, 0, 1/2, 1/2, 1/2, 1/2,` `0, 0, 0, 0, 1/2, 1/2, 1/2, 1/2, 1/2,` `0, 0, 0, 0, 0, 1/2, 1/2, 1/2, 1/2, 1/2,` `0, 0, 0, 0, 0, 1/2, 1/2, 1/2, 1/2, 1/2, 1/2`
	CROSSREFS	`Sequence in context: A123063 A031358 A029317 this_sequence A035692 A143613 A121363` `Adjacent sequences: A127797 A127798 A127799 this_sequence A127801 A127802 A127803`
	KEYWORD	`sign,tabl`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 29 2007`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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