login
The OEIS is supported by the many generous donors to the OEIS 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

%I #3 Mar 30 2012 16:49:17

%S 1,1,1,1,2,6,8,40,720,560,4480,362880,1209600,13305600,479001600,

%T 188697600,2641766400,1307674368000,774918144000,1197600768000,

%U 44771844096000,3119105138688000,73724303278080000,4644631106519040000

%N 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!.

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

%Y Cf. A065952-A065956.

%K nonn,frac

%O 1,5

%A _N. J. A. Sloane_, Dec 08 2001

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 09:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)