A034995 Smallest square starting with a string of n 9's.

9, 99225, 9991921, 999950884, 99999515529, 9999995824729, 999999961946176, 99999999356895225, 99999999989350756, 999999999956753113201, 99999999999470044512256, 9999999999991276338467889

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..499

Maple

f:= proc(n) local d, q, x;
  for d from n do
     q:= 10^d-10^(d-n);
     x:= isqrt(q);
     if x^2 < q then x:= x+1 fi;
     if x^2 < 10^d then return x^2 fi
  od
end proc:
map(f, [$1..20]); # Robert Israel, Sep 28 2018

Crossrefs

Cf. A034994.

Sequence in context: A014381 A185293 A281360 * A109464 A300195 A368068

Adjacent sequences: A034992 A034993 A034994 * A034996 A034997 A034998

Keyword

nonn,base

Author

Patrick De Geest, Nov 15 1998

Extensions

More terms from Hans Havermann, Jun 18 2001

Status

approved