The number of regions inside a concave circular triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
A340685
The number of regions inside a concave circular triangle formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.
Terms
- a(0) =1a(1) =12a(2) =28a(3) =102a(4) =187a(5) =462a(6) =868a(7) =1590a(8) =3046a(9) =4398a(10) =6541a(11) =8646a(12) =12256a(13) =15336a(14) =20947a(15) =26610a(16) =33478a(17) =41832a(18) =50821a(19) =64710a(20) =77110a(21) =97878a(22) =113932a(23) =136560a(24) =160849a(25) =185220a(26) =216286a(27) =246450a(28) =289945a(29) =324594
External references
- oeis: A340685