Squares of odd Lucas numbers.

Terms

a(0) =1a(1) =9a(2) =49a(3) =121a(4) =841a(5) =2209a(6) =15129a(7) =39601a(8) =271441a(9) =710649a(10) =4870849a(11) =12752041a(12) =87403801a(13) =228826129a(14) =1568397609a(15) =4106118241a(16) =28143753121a(17) =73681302249a(18) =505019158609