A009392 - OEIS

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A009392

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

0, 1, -1, -3, 8, 25, -121, -427, 3128, 12465, -124921, -555731, 7158128, 35135945, -557749921, -2990414715, 56767019408, 329655706465, -7316056402321, -45692713833379, 1164842760597368, 7777794952988025, -224574978081433321 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MATHEMATICA	`Log[ 1+Tanh[ x ] ]/Cosh[ x ]`
	CROSSREFS	`Sequence in context: A051403 A004205 A097713 * A130648 A061812 A009452` `Adjacent sequences: A009389 A009390 A009391 * A009393 A009394 A009395`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.