Number of irreducible polynomials (over the rationals) of form a*x^2+b*x+c, 1 <= a,b,c <= n.

Terms

a(0) =1a(1) =7a(2) =24a(3) =56a(4) =112a(5) =196a(6) =313a(7) =469a(8) =672a(9) =926a(10) =1239a(11) =1611a(12) =2057a(13) =2577a(14) =3179a(15) =3863a(16) =4647a(17) =5523a(18) =6512a(19) =7606a(20) =8819a(21) =10155a(22) =11624a(23) =13214a(24) =14955a(25) =16841a(26) =18880a(27) =21076a(28) =23448a(29) =25966