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%I #14 Sep 06 2014 00:24:49
%S 3,7,23,47,283,719,1439,2879,34549,138197,1266767,14619833,36449279,
%T 377982107,1432349099
%N Smallest k such that 9^^n is not congruent to 9^^(n-1) mod k, where 9^^n denotes the power tower 9^9^...^9 (in which 9 appears n times).
%C For general remarks regarding sequences of this type, see A246491.
%C This particular sequence shares all known terms with A082449. they might be identical.
%o (Sage, cython) Use linked source from A246491 with this command: find_k_values(9,1,1)
%Y Cf. A082449, A027763, A246491, A246492, A246493, A246494, A246495, A246496.
%K nonn,more
%O 1,1
%A _Wayne VanWeerthuizen_, Aug 27 2014
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