Number of conics which pass through 3 points and are bitangent to a general curve of order n.

Terms

a(0) =0a(1) =0a(2) =4a(3) =36a(4) =132a(5) =340a(6) =720a(7) =1344a(8) =2296a(9) =3672a(10) =5580a(11) =8140a(12) =11484a(13) =15756a(14) =21112a(15) =27720a(16) =35760a(17) =45424a(18) =56916a(19) =70452a(20) =86260a(21) =104580a(22) =125664a(23) =149776a(24) =177192a(25) =208200a(26) =243100a(27) =282204a(28) =325836a(29) =374332