Numbers of form x^2 + 7y^2.

Terms

a(0) =0a(1) =1a(2) =4a(3) =7a(4) =8a(5) =9a(6) =11a(7) =16a(8) =23a(9) =25a(10) =28a(11) =29a(12) =32a(13) =36a(14) =37a(15) =43a(16) =44a(17) =49a(18) =53a(19) =56a(20) =63a(21) =64a(22) =67a(23) =71a(24) =72a(25) =77a(26) =79a(27) =81a(28) =88a(29) =92