Number of distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.

A331702

Number of distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.

Terms

    a(0) =0a(1) =2a(2) =6a(3) =40a(4) =55a(5) =145a(6) =238a(7) =584a(8) =612a(9) =1350a(10) =1804a(11) =2401a(12) =3523a(13) =5180a(14) =6150a(15) =9312a(16) =11101a(17) =13645a(18) =17746a(19) =22300a(20) =25998a(21) =33462a(22) =39514a(23) =43993a(24) =55225a(25) =66976a(26) =74088a(27) =88956a(28) =102109a(29) =111841

External references