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%I #38 Jul 29 2015 18:44:29
%S 1,9,6,6,8,9,1,7,6,1,7,9,0,1,7,6,3,6,5,3,3,3,5,0,5,7,2,0,2,2,6,6,9,8,
%T 2,7,6,1,3,2,2,1,2,1,1,8,6,8,6,3,3,5,3,4,2,2,0,1,8,5,8,2,8,8,3,1,2,6,
%U 2,5,6,4,4,2
%N Decimal expansion of the generating constant c of A139244.
%C A139244(n-1) = ceiling(c^(2^n)).
%C The digit 4 appears for the first time only at position n=53, making it the last one to appear in the sequence.
%H A. V. Aho and N. J. A. Sloane, <a href="http://www.fq.math.ca/11-4.html">Some doubly exponential sequences</a>, The Fibonacci Quarterly, 11 (1973), 429-437.
%e 1.96689176179017636533350572... .
%Y Cf. A139244.
%K nonn,cons
%O 1,2
%A _Chayim Lowen_, Jul 22 2015
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