Number of nonempty subsets of the set of vertices of a regular n-gon in the plane such that their center of gravity is the center of the polygon.
A070894
Number of nonempty subsets of the set of vertices of a regular n-gon in the plane such that their center of gravity is the center of the polygon.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =9a(5) =1a(6) =15a(7) =7a(8) =33a(9) =1a(10) =99a(11) =1a(12) =129a(13) =37a(14) =255a(15) =1a(16) =999a(17) =1a(18) =1155a(19) =133a(20) =2049a(21) =1a(22) =9999a(23) =31a(24) =8193a(25) =511a(26) =16899a(27) =1a(28) =146853a(29) =1
External references
- oeis: A070894