%I
%S 1,25,1849,36481,2666689,52606009,3845364121,75857828929,
%T 5545012396225,109386936710041,7995904029992761,157735886878050625,
%U 11530088066237165569,227455039491212291641,16626378995609962758169
%N Numbers n such that n remains square when digit 6 is appended.
%C The terms of the sequence are the squares of the yvalues in the solution to the Pellian equation x^210*y^2=6.  _Colin Barker_, Sep 28 2013
%F Empirical G.f.: x*(x^4+24*x^3+382*x^2+24*x+1) / ((x1)*(x^238*x+1)*(x^2+38*x+1)). [_Colin Barker_, Jan 31 2013]
%K nonn,base
%O 1,2
%A _David W. Wilson_
