login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A065953 Denominator of (-1)^n*n!*(E(n,2)-E(n,1)*E(n-1,1)) where E(n,x) = Sum_{k=0..n} (-1)^k*x^k/k!. 1
1, 1, 1, 1, 2, 6, 8, 40, 720, 560, 4480, 362880, 1209600, 13305600, 479001600, 188697600, 2641766400, 1307674368000, 774918144000, 1197600768000, 44771844096000, 3119105138688000, 73724303278080000, 4644631106519040000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

1, 2, 3, 5, 17/2, 89/6, 211/8, 1903/40, 62473/720, ...

CROSSREFS

Cf. A065952-A065956.

Sequence in context: A335111 A095239 A192009 * A118211 A050552 A105607

Adjacent sequences:  A065950 A065951 A065952 * A065954 A065955 A065956

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Dec 08 2001

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 10 03:47 EDT 2020. Contains 336368 sequences. (Running on oeis4.)