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!)
A056200 a(n) = 2^n - A056045(n). 0

%I #11 Aug 25 2019 13:21:53

%S 1,1,4,5,26,22,120,149,418,716,2036,2378,8178,12846,29294,50709,

%T 131054,193972,524268,843260,1979520,3488618,8388584,13190042,

%U 33501276,56707912,129527950,227113934,536870882,887838482,2147483616

%N a(n) = 2^n - A056045(n).

%C If p is prime then a(p) = 2^p-p-1. If p=7, a(7)=120.

%o (PARI) a(n) = 2^n - sumdiv(n, d, binomial(n, d)); \\ _Michel Marcus_, Aug 25 2019

%Y Cf. A000079, A056045.

%K nonn

%O 1,3

%A _Labos Elemer_, Aug 02 2000

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.)