Number of regions in a polygon whose boundary consists of n+2 equally spaced points around a semicircle and three equally spaced points along the diameter (a total of n+3 points). See Comments for precise definition.
A333642
Number of regions in a polygon whose boundary consists of n+2 equally spaced points around a semicircle and three equally spaced points along the diameter (a total of n+3 points). See Comments for precise definition.
Terms
- a(0) =2a(1) =8a(2) =20a(3) =43a(4) =80a(5) =139a(6) =224a(7) =324a(8) =510a(9) =730a(10) =992a(11) =1373a(12) =1820a(13) =2187a(14) =3040a(15) =3844a(16) =4720a(17) =5916a(18) =7220a(19) =8498a(20) =10472a(21) =12463a(22) =14570a(23) =17278a(24) =20150a(25) =23130a(26) =26964a(27) =30961a(28) =34688a(29) =40265
External references
- oeis: A333642