Number of positive integers <= 2^n of form 7 x^2 + 10 y^2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =8a(7) =16a(8) =28a(9) =56a(10) =104a(11) =197a(12) =369a(13) =699a(14) =1331a(15) =2540a(16) =4870a(17) =9354a(18) =18066a(19) =34949a(20) =67788a(21) =131656a(22) =256271a(23) =499498a(24) =974856a(25) =1904908a(26) =3726067a(27) =7295536a(28) =14297372a(29) =28041681