The number of edges on 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.
A340687
The number of edges on 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) =3a(1) =21a(2) =51a(3) =177a(4) =354a(5) =852a(6) =1686a(7) =3036a(8) =5994a(9) =8550a(10) =12933a(11) =16938a(12) =24303a(13) =30192a(14) =41616a(15) =52581a(16) =66600a(17) =82857a(18) =101199a(19) =128409a(20) =153669a(21) =194505a(22) =227193a(23) =271635a(24) =320898a(25) =368703a(26) =431640a(27) =490884a(28) =578805a(29) =646869
External references
- oeis: A340687