Number of positive integers <= 2^n of form 5 x^2 + 7 y^2.

Terms

a(0) =0a(1) =0a(2) =0a(3) =2a(4) =3a(5) =6a(6) =11a(7) =20a(8) =37a(9) =69a(10) =128a(11) =241a(12) =458a(13) =869a(14) =1666a(15) =3202a(16) =6183a(17) =11966a(18) =23227a(19) =45149a(20) =87983a(21) =171703a(22) =335520a(23) =656541a(24) =1286071a(25) =2521752a(26) =4949262a(27) =9721510a(28) =19109550a(29) =37589316