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!)
A027172 a(n) = (1/2) * A027170(2n, n). 0

%I #8 Oct 24 2019 19:13:29

%S 5,21,78,285,1048,3892,14584,55053,209064,797808,3056870,11752676,

%T 45316898,175175818,678639148,2634146413,10241938408,39882831448,

%U 155519160718,607181138848,2373227900938,9285480209458,36364319046898

%N a(n) = (1/2) * A027170(2n, n).

%C A027175(n) + 2.

%K nonn

%O 1,1

%A _Clark Kimberling_

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 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)