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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A144578 Denominators of expansion of exp(1-sqrt(1-x-2*x^2)). 1
1, 2, 4, 48, 384, 1920, 46080, 129024, 1032192, 185794560, 3715891200, 40874803200, 78479622144, 10202350878720, 64924051046400, 42849873690624000, 1371195958099968000, 4662066257539891200, 335668770542872166400, 5797915127558701056000 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

EXAMPLE

1 + (1/2)*x + (5/4)*x^2 + (55/48)*x^3 + (757/384)*x^4 + (4973/1920)*x^5 + (...

CROSSREFS

Cf. A144577.

Sequence in context: A019596 A088301 A144580 * A143968 A097424 A032019

Adjacent sequences:  A144575 A144576 A144577 * A144579 A144580 A144581

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Jan 07 2009

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 16 21:51 EST 2012. Contains 205978 sequences.