id:A009820 - OEIS Search Results

Search: id:A009820

Displaying 1-1 of 1 results found.

page 1

Expansion of tanh(tanh(ln(1+x))).

+0
1

0, 1, -1, -2, 18, -44, -300, 3928, -12544, -193160, 3128040, -11235872, -311721168, 5932512496, -21553521808, -1023800851712, 21959034049920, -72153838392704, -5963595925511808, 139976498126622976, -351219561048021760 (list; graph; listen)

	OFFSET	`0,4`
	MATHEMATICA	`Tanh[ Tanh[ Log[ 1+x ] ] ]`
	CROSSREFS	`Sequence in context: A098857 A072278 A131538 this_sequence A126909 A139268 A052681` `Adjacent sequences: A009817 A009818 A009819 this_sequence A009821 A009822 A009823`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

page 1

Search completed in 0.002 seconds

Last modified December 3 01:16 EST 2008. Contains 151161 sequences.

AT&T Labs Research