a(n)^2 is the smallest square containing exactly n 2's.

A048347

a(n)^2 is the smallest square containing exactly n 2's.

Terms

    a(0) =5a(1) =15a(2) =149a(3) =1415a(4) =4585a(5) =14585a(6) =105935a(7) =364585a(8) =3496101a(9) =4714045a(10) =34964585a(11) =149305935a(12) =1490725415a(13) =4714469665a(14) =1490711985a(15) =149071333335

External references