%I
%S 1,4,16,424,16816,42432424,1681612816816,42432424483242432424,
%T 168161281681616321281681612816816,
%U 42432424483242432424424424128483242432424483242432424
%N a(1) = 1, a(n)= number obtained by replacing each digit of a(n1) with four times its value.
%Y Cf. A061581A061587.
%K nonn,base,easy
%O 1,2
%A _Amarnath Murthy_, May 13 2001
%E More terms from Larry Reeves (larryr(AT)acm.org) and Asher Natan Auel (auela(AT)reed.edu), May 15 2001
%E a(9) corrected by _N. J. A. Sloane_, Jan 23 2017 at the suggestion of Carolyn Liao.
