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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A130188 Denominators of rationals r(n) related to the z-sequence of the Sheffer matrix A060821 for Hermite polynomials. 1
1, 4, 4, 32, 16, 64, 64, 1024, 256, 1024, 1024, 8192, 4096, 16384, 16384, 524288, 65536, 262144, 262144, 2097152, 1048576, 4194304, 4194304, 67108864, 16777216, 67108864, 67108864, 536870912, 268435456, 1073741824 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

Numerators are A130187.

See A130187 for details on r(n):= A130187(n)/a(n) and the corresponding z-sequence for the Hermite matrix A060821.

FORMULA

a(n)=denominator(-2*z(2*n+1)), n>=0, with the e.g.f. for z(n) given in A130187.

CROSSREFS

Sequence in context: A120030 A138504 A002611 * A189743 A089542 A145109

Adjacent sequences:  A130185 A130186 A130187 * A130189 A130190 A130191

KEYWORD

nonn,frac,easy

AUTHOR

Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jun 01 2007

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 19:15 EST 2012. Contains 205852 sequences.