Numbers n with property that n^2 starts and ends with 81.

Terms

a(0) =9a(1) =2859a(2) =9009a(3) =9041a(4) =28491a(5) =28509a(6) =28541a(7) =28559a(8) =28591a(9) =28609a(10) =90009a(11) =90041a(12) =90059a(13) =90091a(14) =90109a(15) =90141a(16) =90159a(17) =90191a(18) =90209a(19) =90241a(20) =90259a(21) =90291a(22) =90309a(23) =90341a(24) =90359a(25) =90391a(26) =90409a(27) =90441a(28) =90459a(29) =90491