Palindromes of the form k*(k + 1).

Terms

a(0) =2a(1) =6a(2) =272a(3) =6006a(4) =289982a(5) =2629262a(6) =6039306a(7) =27999972a(8) =28233282a(9) =2704884072a(10) =20278187202a(11) =20591819502