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The number of noncototient numbers <= 10^n.

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`%I #7 Aug 03 2017 11:37:03
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`%S 1,8,98,963,10527,110786,1128160,11355049,113482572,1129598504
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`%N The number of noncototient numbers <= 10^n.
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`%C a(5)-a(8) were taken from the paper by Pomerance and Yang.
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`%C a(9)-a(10) were taken from the paper Pollack and Pomerance.
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`%H Carl Pomerance and Hee-Sung Yang, <a href="http://doi.org/10.1090/S0025-5718-2013-02775-5">Variant of a theorem of Erdős on the sum-of-proper-divisors function</a>, Mathematics of Computation, Vol. 83, No. 288 (2014), pp. 1903-1913.
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`%H Paul Pollack and Carl Pomerance, <a href="http://dx.doi.org/10.1090/btran/10">Some problems of Erdős on the sum-of-divisors function</a>, Transactions of the American Mathematical Society, Series B Vol. 3, No. 1 (2016), pp. 1-26.
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`%Y Cf. A005278.
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`%K nonn,more
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`%O 1,2
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`%A _Amiram Eldar_, Jul 24 2017
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