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%I #15 Aug 04 2021 07:43:10
%S 0,72,792,7992,79992,799992,7999992,79999992,799999992,7999999992,
%T 79999999992,799999999992,7999999999992,79999999999992,
%U 799999999999992,7999999999999992,79999999999999992,799999999999999992,7999999999999999992,79999999999999999992,799999999999999999992
%N a(n) = 8*(10^n - 1).
%C Original definition: a(n) = k where R(k+8) = 8.
%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (11,-10).
%F a(n) = 8*9*A002275(n) = 8*A002283(n).
%F R(a(n)) = A086574(n).
%F From _Chai Wah Wu_, Jul 08 2016: (Start)
%F a(n) = 11*a(n-1) - 10*a(n-2) for n > 1.
%F G.f.: 72*x/((1 - x)*(1 - 10*x)). (End)
%Y Cf. A004086 (R(n)).
%Y One of family of sequences of form a(n) = k, where R(k+m) = m, m=1 to 9; m=1: A002283, m=2: A086573, m=3: A086574, m=4: A086575, m=5: A086576, m=6: A086577, m=7: A086578, m=8: A086579, m=9: A086580.
%K nonn
%O 0,2
%A _Ray Chandler_, Jul 22 2003
%E Edited by _Jinyuan Wang_, Aug 04 2021
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