Number of positive integers <= 2^n of form 9 x^2 + 10 y^2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =3a(6) =7a(7) =14a(8) =26a(9) =49a(10) =92a(11) =171a(12) =328a(13) =618a(14) =1182a(15) =2267a(16) =4375a(17) =8451a(18) =16383a(19) =31797a(20) =61891a(21) =120644a(22) =235516a(23) =460327a(24) =900867a(25) =1765050a(26) =3461135a(27) =6793369a(28) =13343702a(29) =26229268