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A250433 Numbers whose squares remain squares when prepended with 7 and appended with 25 in base 10. 3

%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

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Last modified July 29 05:20 EDT 2021. Contains 346340 sequences. (Running on oeis4.)