id:A110243 - OEIS Search Results

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Row sums of a Jacobi triangle.

+0
3

1, 2, -1, -1, 5, 1, -1, -1, 1, 7, -1, -1, 1, 1, -1, -1, 17, 1, -1, -1, 1, 1, -1, -1, 1, 21, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 25, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 43, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 65, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 55, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Row sums of A110242. It appears that only A110243(n^2) differs from +/-1, n>1.`
	FORMULA	`a(n)=sum{k=0..n, Jacobi(n, 2n-2k+1)}`
	CROSSREFS	`Sequence in context: A083677 A075803 A127966 this_sequence A088347 A069568 A136789` `Adjacent sequences: A110240 A110241 A110242 this_sequence A110244 A110245 A110246`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 17 2005`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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