login
Square numbers that remain square when their 2 most-significant (or leftmost) digits in base 10 are removed.
1

%I #9 Nov 15 2014 16:42:04

%S 16,25,36,49,64,81,100,121,144,169,289,324,361,400,441,484,529,729,

%T 784,841,900,961,1225,1600,1681,1764,1849,1936,2025,2116,2209,2304,

%U 2401,2500,2601,2704,2809,2916,3025,3136,3249,3364,3481,3600,4225,4900,5625,6400

%N Square numbers that remain square when their 2 most-significant (or leftmost) digits in base 10 are removed.

%H Chai Wah Wu, <a href="/A245371/b245371.txt">Table of n, a(n) for n = 1..4137</a>

%e 9150625 and 50625 are both squares.

%Y Cf. A225885.

%K nonn,base

%O 1,1

%A _Chai Wah Wu_, Nov 14 2014