n^3*a(n) is the number of circles in complex projective plane tangent to three smooth curves of degree n in general position.

A030653

n^3*a(n) is the number of circles in complex projective plane tangent to three smooth curves of degree n in general position.

Terms

    a(0) =4a(1) =23a(2) =60a(3) =121a(4) =212a(5) =339a(6) =508a(7) =725a(8) =996a(9) =1327a(10) =1724a(11) =2193a(12) =2740a(13) =3371a(14) =4092a(15) =4909a(16) =5828a(17) =6855a(18) =7996a(19) =9257a(20) =10644a(21) =12163a(22) =13820a(23) =15621a(24) =17572a(25) =19679a(26) =21948a(27) =24385a(28) =26996a(29) =29787

External references