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Squares with initial digit '9'.
10

%I #10 Sep 04 2021 17:03:57

%S 9,900,961,9025,9216,9409,9604,9801,90000,90601,91204,91809,92416,

%T 93025,93636,94249,94864,95481,96100,96721,97344,97969,98596,99225,

%U 99856,900601,902500,904401,906304,908209,910116,912025,913936,915849

%N Squares with initial digit '9'.

%F a(n) = A045863(n)^2. - _Michel Marcus_, Sep 04 2021

%t Select[Range[1000]^2,First[IntegerDigits[#]]==9&] (* _Harvey P. Dale_, Apr 21 2015 *)

%Y Cf. A045863.

%Y Cf. A045784, A045785, A045786, A045787, A045788, A045789, A045791, A045792.

%K nonn,base

%O 1,1

%A _Jeff Burch_