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Search: id:A012017
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A012017 sec(sin(tan(x)))=1+1/2!*x^2+9/4!*x^4+153/6!*x^6+2993/8!*x^8... +0
1
1, 1, 9, 153, 2993, -72111, -33331719, -7328604631, -1581635839519, -356792088521439, -81022312424248727, -15576441107086727111, 22243831754082386577, 3229505766853670411015281 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A027018 A089916 A093849 this_sequence A130980 A133309 A113391

Adjacent sequences: A012014 A012015 A012016 this_sequence A012018 A012019 A012020

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified August 29 14:50 EDT 2008. Contains 143238 sequences.

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