Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A012621
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A012621 sech(arcsinh(x)*tan(x))=1-12/4!*x^4-120/6!*x^6+1680/8!*x^8... +0
1
1, 0, -12, -120, 1680, 367680, 12095424, -560956032, -447394871040, -8068784621568, -1294533276204032, 6639186363172284416, -1043706052752056152064, 641443809049086939217920 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A129064 A120585 A012565 this_sequence A102341 A009078 A009149

Adjacent sequences: A012618 A012619 A012620 this_sequence A012622 A012623 A012624

KEYWORD

sign

AUTHOR

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

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research

Legal Notice
© 2009 AT&T Intellectual Property. All Rights Reserved.