Numbers of the form (5^j + 9^k)/2, for j and k >= 0.

Terms

a(0) =1a(1) =3a(2) =5a(3) =7a(4) =13a(5) =17a(6) =41a(7) =43a(8) =53a(9) =63a(10) =67a(11) =103a(12) =313a(13) =317a(14) =353a(15) =365a(16) =367a(17) =377a(18) =427a(19) =677a(20) =1563a(21) =1567a(22) =1603a(23) =1927a(24) =3281a(25) =3283a(26) =3293a(27) =3343a(28) =3593a(29) =4843