Sum of two squares of Lucas numbers (A000032).

Terms

a(0) =2a(1) =5a(2) =8a(3) =10a(4) =13a(5) =17a(6) =18a(7) =20a(8) =25a(9) =32a(10) =50a(11) =53a(12) =58a(13) =65a(14) =98a(15) =122a(16) =125a(17) =130a(18) =137a(19) =170a(20) =242a(21) =325a(22) =328a(23) =333a(24) =340a(25) =373a(26) =445a(27) =648a(28) =842a(29) =845