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%I #4 Jun 27 2018 09:33:28
%S 1,4,9,4,7,1,4,9,4,7,9,4,7,1,4,7,9,1,4,7,9,1,4,7,1,4,7,9,1,4,7,9,1,4,
%T 7,1,4,7,9,1,4,7,9,1,4,7,1,4,7,1,4,7,9,4,9,1,4,7,9,1,4,9,1,4,7,9,1,4,
%U 7,9,1,4,7,9,1,4,7,9,1,4
%N Digital roots of A068809.
%e a(4)=4 since A068809(4)=49 and so 4+9=13 and 1+3=4.
%Y Cf. A068809, A068949.
%K more,nonn,base
%O 1,2
%A Francois Jooste (phukraut(AT)hotmail.com), Mar 15 2002
%E a(43)-a(80) from _Giovanni Resta_, Jun 27 2018
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