A034993 Smallest square starting with a string of n 8's.

81, 8836, 88804, 88887184, 88888055881, 888888810481, 888888810481, 8888888859057216, 88888888888905609, 88888888888905609, 88888888888905609, 888888888888769405062724, 888888888888817576082400016, 8888888888888825421477138436, 888888888888888199001963335969, 888888888888888832115283007868025

Offset: 1

Author

Patrick De Geest, Nov 15 1998

Keywords

• nonn
• base

Links

• Robert Israel, Table of n, a(n) for n = 1..300

Crossrefs

Cf. A034992.

Programs

Maple

f:= proc(n) local q, k, x;
  q:= 8*(10^n-1)/9;
  for k from 0 do
    x:= ceil(sqrt(q*10^k));
    if x^2 < (q+1)*10^k then return x^2 fi
  od
end proc:
map(f, [$1..20]); # Robert Israel, Jun 26 2018

Extensions

More terms from Robert Israel, Jun 26 2018