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%I #25 Feb 27 2021 10:09:22
%S 2,27,271,2718,27182,271828,2718281,27182818,271828182,2718281828,
%T 27182818284,271828182845,2718281828459,27182818284590,
%U 271828182845904,2718281828459045,27182818284590452,271828182845904523,2718281828459045235,27182818284590452353,271828182845904523536
%N Decimal expansion of e truncated to n places.
%C a(n) <= A011544(n) <= a(n)+1. - _Danny Rorabaugh_, Mar 07 2015
%H Danny Rorabaugh, <a href="/A011543/b011543.txt">Table of n, a(n) for n = 0..999</a>
%F a(n) = floor(e*10^n).
%t Module[{nn=30,edgs},edgs=RealDigits[E,10,nn][[1]];Table[ FromDigits[ Take[ edgs, n]],{n,nn}]] (* _Harvey P. Dale_, Oct 04 2017 *)
%o (PARI) a(n) = floor(exp(1)*10^n); \\ _Michel Marcus_, Mar 08 2015
%o (Python)
%o from sympy import E
%o def a(n): return int(E*10**n)
%o print([a(n) for n in range(21)]) # _Michael S. Branicky_, Feb 27 2021
%Y Cf. A001113, A011544.
%Y Cf. A011545, A011547, A011549, A011551.
%K nonn,easy,base
%O 0,1
%A _N. J. A. Sloane_.
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