a(n+1) is the smallest square > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(0)=1.

A067713

a(n+1) is the smallest square > a(n) such that the digits of a(n) are all (with multiplicity) contained in the digits of a(n+1), with a(0)=1.

Terms

    a(0) =1a(1) =16a(2) =169a(3) =196a(4) =961a(5) =1296a(6) =2916a(7) =9216a(8) =12769a(9) =96721a(10) =237169a(11) =729316a(12) =1073296a(13) =1630729a(14) =2709316a(15) =10329796a(16) =69739201a(17) =109327936a(18) =130279396a(19) =133079296a(20) =133702969a(21) =309971236a(22) =317302969a(23) =917302369a(24) =1353209796a(25) =1725903936

External references