Number of positive integers <= 2^n of form 3 x^2 + 10 y^2.

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =4a(5) =6a(6) =12a(7) =23a(8) =42a(9) =76a(10) =143a(11) =262a(12) =496a(13) =938a(14) =1783a(15) =3397a(16) =6515a(17) =12523a(18) =24152a(19) =46711a(20) =90543a(21) =175867a(22) =342161a(23) =666712a(24) =1300805a(25) =2541033a(26) =4969255a(27) =9727606a(28) =19059560a(29) =37374839