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%I #22 Sep 08 2022 08:45:11
%S 23,293,2993,29993,299993,2999993,29999993,299999993,2999999993,
%T 29999999993,299999999993,2999999999993,29999999999993,
%U 299999999999993,2999999999999993,29999999999999993,299999999999999993
%N Integers k such that R(k+7) = 3.
%C R(a(n)) = A086942(n).
%H Vincenzo Librandi, <a href="/A086943/b086943.txt">Table of n, a(n) for n = 1..300</a>
%F a(n) = 3*10^n - 7.
%t FromDigits/@Table[Join[{2},Table[9,{n}],{3}],{n,0,20}] (* _Harvey P. Dale_, Aug 21 2011 *)
%o (Magma) [3*10^n-7: n in [1..25] ]; // _Vincenzo Librandi_, Aug 22 2011
%o (Maxima) A086943(n):=3*10^n-7$
%o makelist(A086943(n),n,1,17); /* _Martin Ettl_, Nov 08 2012 */
%Y Cf. A004086, A086942.
%K nonn,base,easy
%O 1,1
%A _Ray Chandler_, Jul 24 2003
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