Perfect squares one more than a palindrome.

Terms

a(0) =1a(1) =4a(2) =9a(3) =100a(4) =324a(5) =576a(6) =4225a(7) =5776a(8) =10000a(9) =36864a(10) =42025a(11) =1000000a(12) =3055504a(13) =3640464a(14) =5597956a(15) =8803089a(16) =32855824a(17) =100000000a(18) =360696064a(19) =422919225a(20) =10000000000a(21) =30485858404a(22) =30536863504a(23) =32154945124a(24) =59080108096a(25) =86310801369a(26) =304816618404a(27) =1000000000000