The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A093462 a(1)=1, a(n) = 2(n^(n-1)-1)/(n-1)^2. 1

%I #8 Aug 26 2015 20:58:00

%S 1,2,4,14,78,622,6536,85598,1345210,24691358,518748492,12281130094,

%T 323584515590,9393074239694,297887000259088,10248191152060862,

%U 380165561528647410,15127415638330079806,642761421592044700820

%N a(1)=1, a(n) = 2(n^(n-1)-1)/(n-1)^2.

%t Insert[Table[2*(n^(n - 1) - 1)/(n - 1)^2, {n, 2, 20}], 1, 1] (* _Stefan Steinerberger_, Mar 18 2006 *)

%Y Cf. A093460, A093461.

%K nonn

%O 1,2

%A _Amarnath Murthy_, Apr 05 2004

%E Corrected and extended by _Stefan Steinerberger_, Mar 18 2006

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 June 18 07:40 EDT 2024. Contains 373469 sequences. (Running on oeis4.)