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)=4.

A067717

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)=4.

Terms

    a(0) =4a(1) =49a(2) =1849a(3) =18496a(4) =134689a(5) =1338649a(6) =3319684a(7) =13380964a(8) =30891364a(9) =38390416a(10) =93683041a(11) =103693489a(12) =139098436a(13) =318693904a(14) =433180969a(15) =803949316a(16) =1036389249a(17) =1836293904a(18) =2893041369a(19) =3029841936a(20) =3103269849a(21) =3134096289a(22) =3321908496

External references