Squares that remain squares if you decrease them by 3 times a repunit with the same number of digits.

A273230

Squares that remain squares if you decrease them by 3 times a repunit with the same number of digits.

Terms

    a(0) =4a(1) =49a(2) =529a(3) =4489a(4) =38809a(5) =344569a(6) =363609a(7) =375769a(8) =444889a(9) =558009a(10) =597529a(11) =700569a(12) =7198489a(13) =35366809a(14) =44448889a(15) =65983129a(16) =4444488889a(17) =5587114009a(18) =83574762649a(19) =335330171929a(20) =359763638809a(21) =390241344249a(22) =403831017529a(23) =407200963129a(24) =435775577689a(25) =444444888889a(26) =453557800089

External references