%I
%S 260355890,507772957604920,138060730605508232231178662796610,
%T 41659593852939906475539587793151784,
%U 849684968293046546038644821334016760090110
%N Numbers whose squares remain squares when prepended with 7 and appended with 25 in base 10.
%e 260355890^2 = 67785189457692100, 76778518945769210025 = 8762335245^2.
%Y Cf. A249621, A249968, A249969, A249970, A249971, A249972, A250434, A250435.
%K nonn,base,more
%O 1,1
%A _Chai Wah Wu_, Nov 23 2014
%E a(5) from _Chai Wah Wu_, Jul 20 2017
