id:A110091 - OEIS Search Results

Search: id:A110091

Displaying 1-1 of 1 results found.

page 1

Denominators of sequence of rationals defined by r(n) = n for n<=1 and for n>1: r(n) = (sum of denominators of r(n-1) and r(n-2))/(sum of numerators of r(n-1) and r(n-2)).

+0
2

1, 1, 1, 3, 1, 3, 5, 1, 5, 7, 1, 7, 9, 1, 9, 11, 1, 11, 13, 1, 13, 15, 1, 15, 17, 1, 17, 19, 1, 19, 21, 1, 21, 23, 1, 23, 25, 1, 25, 27, 1, 27, 29, 1, 29, 31, 1, 31, 33, 1, 33, 35, 1, 35, 37, 1, 37, 39, 1, 39, 41, 1, 41, 43, 1, 43, 45, 1, 45, 47, 1, 47, 49, 1, 49, 51, 1, 51, 53, 1, 53, 55 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`r(n) = A110090(n) / a(n);` `a(n) = (A110090(n-1)+A110090(n-2)) / GCD(a(n-1)+a(n-2),A110090(n-1)+A110090(n-2)).`
	FORMULA	`a(3k) = 2k+1, a(3k+1) = 1, a(3k+2) = 2*k+1.`
	CROSSREFS	`Sequence in context: A113759 A134231 A126637 this_sequence A005474 A012264 A063198` `Adjacent sequences: A110088 A110089 A110090 this_sequence A110092 A110093 A110094`
	KEYWORD	`nonn,frac`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 14 2005`

page 1

Search completed in 0.002 seconds

Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

AT&T Labs Research