Number of positive integers <= 2^n of form 8 x^2 + 9 y^2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =7a(7) =14a(8) =26a(9) =48a(10) =92a(11) =168a(12) =320a(13) =605a(14) =1157a(15) =2205a(16) =4235a(17) =8141a(18) =15730a(19) =30427a(20) =59003a(21) =114611a(22) =223037a(23) =434661a(24) =848194a(25) =1657194a(26) =3241128a(27) =6345672a(28) =12434563a(29) =24386363