A116499 - OEIS

%I #14 Oct 14 2024 23:59:58

%S 63565788,777035126,785900449264170834,824735400720481514,

%T 41969556121016094021,7841042904081599033746826,

%U 775474811976872476373043200886,403578381989727694739321538082071713672671,820657465670154825723396137907157085701046

%N Numbers k such that the base-10 representation of k^2 has the structure dmmd, where d is a single digit and m is a string of digits.

%H Max Alekseyev, <a href="/A116499/b116499.txt">Table of n, a(n) for n = 1..100</a>

%e 785900449264170834^2 = 6[17639516153625555][17639516153625555]6.

%Y Cf. A116500, A116501, A305719.

%K base,nonn

%O 1,1

%A _Giovanni Resta_, Feb 18 2006