Squares of Lucas numbers.

Terms

a(0) =4a(1) =1a(2) =9a(3) =16a(4) =49a(5) =121a(6) =324a(7) =841a(8) =2209a(9) =5776a(10) =15129a(11) =39601a(12) =103684a(13) =271441a(14) =710649a(15) =1860496a(16) =4870849a(17) =12752041a(18) =33385284a(19) =87403801a(20) =228826129a(21) =599074576a(22) =1568397609a(23) =4106118241a(24) =10749957124a(25) =28143753121a(26) =73681302249a(27) =192900153616a(28) =505019158609