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a(n) = floor(n*sqrt(e)).
3

%I #11 Jul 02 2018 01:41:21

%S 0,1,3,4,6,8,9,11,13,14,16,18,19,21,23,24,26,28,29,31,32,34,36,37,39,

%T 41,42,44,46,47,49,51,52,54,56,57,59,61,62,64,65,67,69,70,72,74,75,77,

%U 79,80,82,84,85,87,89,90,92,93,95,97,98,100,102,103,105,107,108,110,112

%N a(n) = floor(n*sqrt(e)).

%H Harry J. Smith, <a href="/A061402/b061402.txt">Table of n, a(n) for n = 0..1000</a>

%o (PARI) { default(realprecision, 100); s=sqrt(exp(1)); for (n=0, 1000, write("b061402.txt", n, " ", floor(n*s)) ) } \\ _Harry J. Smith_, Jul 22 2009

%K nonn

%O 0,3

%A _Jason Earls_, Jun 10 2001

%E More terms from _Harry J. Smith_, Jul 22 2009