Smaller of the two successive squares which differ in the use of only one digit.

Terms

a(0) =1a(1) =4a(2) =49a(3) =225a(4) =441a(5) =576a(6) =784a(7) =1296a(8) =2304a(9) =5041a(10) =7396a(11) =8464a(12) =9409a(13) =12769a(14) =17689a(15) =18496a(16) =21609a(17) =23104a(18) =26569a(19) =30276a(20) =32041a(21) =34596a(22) =36481a(23) =40401a(24) =45369a(25) =53824a(26) =55696a(27) =62001a(28) =69169a(29) =71289