login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012727 exp(arctanh(x)*atan(x))=1+2/2!*x^2+12/4!*x^4+328/6!*x^6+13328/8!*x^8... 0
1, 2, 12, 328, 13328, 1160352, 123701952, 22207125120, 4532782825728, 1380071532433920, 459909185638812672, 212375023941305272320, 104929881035116227072000, 68350141067274779587092480 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A094047 A091472 A156518 * A181142 A088229 A060596

Adjacent sequences:  A012724 A012725 A012726 * A012728 A012729 A012730

KEYWORD

nonn

AUTHOR

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 17:46 EST 2012. Contains 205835 sequences.