login
Numbers n such that 1/n starts with n, after excluding leading zeros.
1

%I #9 Feb 19 2024 10:34:13

%S 1,3,10,100,316,1000,3162,10000,100000,1000000,10000000,100000000,

%T 316227766,1000000000,3162277660,10000000000,100000000000,

%U 1000000000000,3162277660168,10000000000000,100000000000000

%N Numbers n such that 1/n starts with n, after excluding leading zeros.

%C All the terms are either 10^k or 10^k*sqrt(10) rounded down.

%e 316 is present because 1/316 = 0.00316..

%K base,nonn

%O 1,2

%A Jonathan Ayres (jonathan.ayres(AT)btinternet.com), Nov 28 2001