id:A094188 - OEIS Search Results

Search: id:A094188

Displaying 1-1 of 1 results found.

page 1

Number of levels in the compositions of n with odd summands.

+0
1

1, 0, 3, 2, 8, 10, 23, 36, 69, 116, 208, 356, 621, 1064, 1831, 3126, 5336, 9070, 15395, 26060, 44041, 74280, 125088, 210312, 353113, 592080, 991563, 1658666, 2771624, 4626706, 7716143, 12857076, 21405261, 35608604, 59192176, 98325356 (list; graph; listen)

	OFFSET	`2,3`
	LINKS	`S. Heubach and T. Mansour, Counting rises, levels, and drops in compositions`
	FORMULA	`G.f.: [x^2(1-x^2)]/[(1+x)^2(1-x-x^2)^2].` `(1/5) * [3nF(n)-4nF(n-1)+7F(n)-10F(n-1)+10(-1)^n], F(n)=A000045(n).`
	CROSSREFS	`Sequence in context: A021308 A060921 A095013 this_sequence A088551 A107300 A047946` `Adjacent sequences: A094185 A094186 A094187 this_sequence A094189 A094190 A094191`
	KEYWORD	`nonn`
	AUTHOR	`Ralf Stephan, May 25 2004`

page 1

Search completed in 0.002 seconds

Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

AT&T Labs Research