n+p(n)+p(p(n)) is a square, where p(n) is the n-th prime.

Terms

a(0) =11a(1) =106a(2) =407a(3) =415a(4) =457a(5) =5049a(6) =11473a(7) =13477a(8) =15356a(9) =18428a(10) =19427a(11) =20669a(12) =27973a(13) =39685a(14) =40062a(15) =45174a(16) =58976a(17) =60616a(18) =66928a(19) =93478a(20) =105516a(21) =108706a(22) =113100a(23) =118511a(24) =139027a(25) =163823a(26) =170002a(27) =178214a(28) =184338a(29) =206388