%I
%S 1,2,4,5,7,8,22,23,27,28,32,33,37,77,84,91,98,105,112,119,126,133,140,
%T 521,529,531,539,541,549,551,559,561,569,571,579,581,589,591,599,601,
%U 609,611,619,621,629,631,639,641,649,651,659,661,669,671
%N Sides of squares which are filled exactly (no holes, no overlaps) by the digits needed to write a subsequence of consecutive square numbers, starting with 0.
%C The square numbers fitting exactly in a "squaresdigits square" are given by A158028. Terms computed by JeanMarc Falcoz.
%H Eric Angelini, <a href="http://www.cetteadressecomportecinquantesignes.com/DigitSpiral.htm">Digit Spiral</a>
%H E. Angelini, <a href="/A158022/a158022.pdf">Digit Spiral</a> [Cached copy, with permission]
%e ...0...01...0116...01161
%e .......49...4964...49640
%e ............2539...25390
%e ............6481...64811
%e ...................21144
%e The above squares, filled exactly by a subsequence of consecutive square numbers starting with 0 have sides 1, 2, 4, 5. There is no side3 square with this property. The next properly filled square will have side 7.
%K base,nonn
%O 1,2
%A _Eric Angelini_, Mar 11 2009
