a(n)^2 is the smallest square containing exactly n 9's.
A048354
a(n)^2 is the smallest square containing exactly n 9's.
Terms
- a(0) =3a(1) =63a(2) =173a(3) =1414a(4) =17313a(5) =53937a(6) =138923a(7) =953937a(8) =3082207a(9) =31622764a(10) =99849687a(11) =301579177a(12) =3033150173a(13) =14142134563a(14) =141413973847a(15) =543315746063
External references
- oeis: A048354