Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A012831
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A012831 cosh(sec(x)*arcsinh(x))=1+1/2!*x^2+9/4!*x^4+225/6!*x^6+6993/8!*x^8... +0
1
1, 1, 9, 225, 6993, 467745, 29529753, 4297350785, 378759492257, 122599030798017, 8002975063348265, 9354851201922233249, -686072407102337430543, 1787263355638656126843105 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A067405 A063386 A063392 this_sequence A012749 A079727 A128492

Adjacent sequences: A012828 A012829 A012830 this_sequence A012832 A012833 A012834

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 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research

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