Palindromes of the form k*(k+5).

Terms

a(0) =0a(1) =6a(2) =66a(3) =414a(4) =696a(5) =41814a(6) =42224a(7) =666666a(8) =4282824a(9) =4754574a(10) =4881884a(11) =416343614a(12) =630939036a(13) =4159669514a(14) =6817557186a(15) =42877777824