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%I #18 Jan 16 2023 06:11:45
%S 1,555,1508,1781,4224,7037
%N Numbers k such that A011544(k-1) is a prime.
%C For k <= 16000, there are six primes in sequence A011544.
%C Round(e*10^112279) = floor(e*10^112279), and floor(e*10^112279) = A011544(112279) (=A007512(7)) is a prime. Thus 112280 = A064118(7) is also a term.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/e-Prime.html">e-Prime</a>
%t Do[If[PrimeQ[Round[E*10^(n-1)]],Print[n],{n,16000}]
%Y Cf. A007512, A011543, A011544, A064118.
%K nonn,base,more
%O 1,2
%A _XU Pingya_, Mar 01 2017
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