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

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =7a(5) =14a(6) =23a(7) =42a(8) =76a(9) =139a(10) =258a(11) =482a(12) =907a(13) =1717a(14) =3269a(15) =6257a(16) =12020a(17) =23171a(18) =44762a(19) =86683a(20) =168233a(21) =327053a(22) =636837a(23) =1241723a(24) =2424228a(25) =4738426a(26) =9271299a(27) =18157441a(28) =35591647a(29) =69820626