%N First 10-digit number to appear n times in the decimal expansion of Pi.
%C This sequence was mentioned in a forum post called "Ten repeating numbers in Pi". It was about finding a 10-digit number that repeated in Pi. The answer was a(2) = A197123(10) = 4392366484.
%H echochamber, <a href="http://echochamber.me/viewtopic.php?t=74216">Ten repeating numbers in Pi</a>, Forums for the webcomic xkcd.com, Sep 2011.
%e a(2) = 4392366484 because 4392366484 is the first 10-digit number to appear 2 times in the decimal expansion of Pi.
%Y Cf. A000796, A096567, A197123, A276686, A276992, A276993, A277171, A291599.
%A _Bobby Jacobs_, Aug 27 2017