A127751 - OEIS

This site is supported by donations to The OEIS Foundation.

A127751

Inverse of number triangle A(n,k)=if(k<=n,if(n<=2k,1/(3n+1),0),0).

1, 0, 4, 0, -4, 7, 0, 4, -7, 10, 0, 0, 0, -10, 13, 0, -4, 7, 0, -13, 16, 0, 0, 0, 0, 0, -16, 19, 0, 4, -7, 10, 0, 0, -19, 22, 0, 0, 0, 0, 0, 0, 0, -22, 25, 0, 0, 0, -10, 13, 0, 0, 0, -25, 28, 0, 0, 0, 0, 0, 0, 0, 0, 0, -28, 31, 0, -4, 7, 0, -13 (list; table; graph; refs; listen; history; internal format)

	OFFSET	`0,3`
	COMMENTS	`Row sums A127752 mod 2 are conjectured to be first Feigenbaum symbolic sequence A035263.`
	EXAMPLE	`Triangle begins` `1,` `0, 4,` `0, -4, 7,` `0, 4, -7, 10,` `0, 0, 0, -10, 13,` `0, -4, 7, 0, -13, 16,` `0, 0, 0, 0, 0, -16, 19,` `0, 4, -7, 10, 0, 0, -19, 22,` `0, 0, 0, 0, 0, 0, 0, -22, 25,` `0, 0, 0, -10, 13, 0, 0, 0, -25, 28,` `0, 0, 0, 0, 0, 0, 0, 0, 0, -28, 31,` `0, -4, 7, 0, -13, 16, 0, 0, 0, 0, -31, 34,` `0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -34, 37` `Inverse of` `1,` `0, 1/4,` `0, 1/7, 1/7,` `0, 0, 1/10, 1/10,` `0, 0, 1/13, 1/13, 1/13,` `0, 0, 0, 1/16, 1/16, 1/16,` `0, 0, 0, 1/19, 1/19, 1/19, 1/19,` `0, 0, 0, 0, 1/22, 1/22, 1/22, 1/22,` `0, 0, 0, 0, 1/25, 1/25, 1/25, 1/25, 1/25,` `0, 0, 0, 0, 0, 1/28, 1/28, 1/28, 1/28, 1/28,` `0, 0, 0, 0, 0, 1/31, 1/31, 1/31, 1/31, 1/31, 1/31`
	CROSSREFS	`Sequence in context: A088375 A135011 A184907 * A028602 A111767 A111511` `Adjacent sequences: A127748 A127749 A127750 * A127752 A127753 A127754`
	KEYWORD	`sign,tabl`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jan 28 2007`

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

Last modified February 16 14:37 EST 2012. Contains 205930 sequences.