id:A105595 - OEIS Search Results

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Row sums of number triangle A105594.

+0
4

1, 1, 3, 1, 3, 3, 3, 1, 3, 3, 3, 3, 3, 7, 3, 9, 1, 3, 3, 5, 5, 7, 9, 3, 3, 7, 9, 15, 7, 13, 21, 13, 1, 1, 5, 1, 3, 5, 7, 11, 3, 3, 7, 13, 5, 11, 13, 19, 3, 7, 7, 7, 7, 19, 9, 25, 7, 13, 21, 23, 15, 27, 19, 39, 1, 1, 3, 1, 5, 5, 3, 9, 3, 5, 11, 9, 9, 13, 19, 21, 3, 7, 7, 9, 7, 15, 17, 19, 7, 15, 21 (list; graph; listen)

	OFFSET	`0,3`
	COMMENT	`Conjecture : all terms are odd.`
	FORMULA	`a(n)=sum{k=0..n, mod(sum{j=0..n, abs(mu(binomial(n, j)))*mod(binomial(j, k), 2)}, 2)}`
	CROSSREFS	`Cf. A105596.` `Sequence in context: A059787 A081325 A132680 this_sequence A072219 A059789 A023136` `Adjacent sequences: A105592 A105593 A105594 this_sequence A105596 A105597 A105598`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 14 2005`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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