%I #3 Mar 30 2012 17:27:18
%S 4,6,6,5,5,6,6,6,6,5,5,6,6,6,6,5,5,6,6,6,5,5,6,6,6,5,5,6,6,6,6,5,5,6,
%T 6,6,6,5,5,6,6,6,6,5,5,6,6,6,6,5,5,6,6,6,5,5,6,6,6,5,5,6,6,6,6,5,5,6,
%U 6,6,6,5,5,6,6,6,6,5,5,6,6,6,6,5,5,6,6,6,5,5,6,6,6,5,5,6,6,6,6,5,5,6,6,6,6
%N Start with a(1)=4; apply 4 -> 665, 5 -> 56665, 6 -> 566665; iterate.
%C a(n)= A081260(n) - A081260(n-1) (taking A081260(0) as equal to 0). Sum of first n terms = A081260(n).
%e 4 -> 665 -> 56666556666556665 -> ...
%Y Cf. A079000, A079948.
%K easy,nonn
%O 1,1
%A _Matthew Vandermast_, Mar 14 2003
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