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A009754 Expansion of tan(x)/cos(ln(1+x)). 0
0, 1, 0, 5, -12, 116, -720, 7048, -67648, 789124, -9839520, 137625652, -2079277200, 34199202272, -604204537664, 11450703405872, -231315430836480, 4966162863717008, -112867805704455936, 2707812372195278800 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

Tan[ x ]/Cos[ Log[ 1+x ] ]

CROSSREFS

Sequence in context: A009426 A009731 A009427 * A096314 A195538 A047658

Adjacent sequences:  A009751 A009752 A009753 * A009755 A009756 A009757

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gérard.

STATUS

approved

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Last modified November 29 00:35 EST 2014. Contains 250479 sequences.