A185906 - OEIS

This site is supported by donations to The OEIS Foundation.

A185906

Weight array of A000007 (which has only one nonzero term and whose second accumulation array is the multiplication table for the positive integers), by antidiagonals.

1, -1, -1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; table; graph; refs; listen; history; text; internal format)

	OFFSET	`1`
	COMMENTS	`A member of the accumulation chain` `...< A185906 < A000007 < A000012 < A003991 < A098358 < A185904 < A185905 < ..., which includes the multiplication table of the positive integers. (See A144112 for the definitions of weight array and accumulation array.)`
	LINKS	`Table of n, a(n) for n=1..105.`
	FORMULA	`T(1,1)=T(2,2)=1; T(1,2)=T(2,1)=-1; T(n,k)=0 for all other (n,k).`
	EXAMPLE	`Northwest corner:` `.1....-1....0....0....0....0....0` `-1.....1....0....0....0....0....0` `.0.....0....0....0....0....0....0` `.0.....0....0....0....0....0....0`
	CROSSREFS	`Cf. A144112, A000007.` `Sequence in context: A204439 A204443 A212412 * A192687 A189141 A187036` `Adjacent sequences: A185903 A185904 A185905 * A185907 A185908 A185909`
	KEYWORD	`tabl,sign`
	AUTHOR	`Clark Kimberling, Feb 06 2011`
	STATUS	`approved`

Content is available under The OEIS End-User License Agreement .

Last modified May 20 05:25 EDT 2013. Contains 225448 sequences.