A120112 - OEIS

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A120112

Row sums of number triangle A120111.

1, -1, -2, -1, -4, 0, -6, -1, -2, 0, -10, 0, -12, 0, 0, -1, -16, 0, -18, 0, 0, 0, -22, 0, -4, 0, -2, 0, -28, 0, -30, -1, 0, 0, 0, 0, -36, 0, 0, 0, -40, 0, -42, 0, 0, 0, -46, 0, -6, 0, 0, 0, -52, 0, 0, 0, 0, 0, -58, 0, -60 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`The last row of the columns in tables A133232 and A133233 are given by this sequence via the formula: if n<k+k*abs(a(n)) then k else 1 (1<=k<=n). - Mats Granvik (mgranvik(AT)abo.fi), Jan 22 2008`
	FORMULA	`a(n)=1-lcm(1,...,n+1)/lcm(1,...,n)`
	CROSSREFS	`Cf. A133232, A133233.` `Sequence in context: A059781 A087664 A158032 * A103977 A109883 A033880` `Adjacent sequences: A120109 A120110 A120111 * A120113 A120114 A120115`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jun 09 2006`

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Last modified February 16 13:12 EST 2012. Contains 205909 sequences.