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a(n) = floor(e^(n*Pi)).
4

%I #21 Aug 11 2021 20:25:49

%S 1,23,535,12391,286751,6635623,153552935,3553321280,82226315585,

%T 1902773895292,44031505860632,1018919543279304,23578503968558226,

%U 545622913077172100,12626092124920479897,292176517015939695007

%N a(n) = floor(e^(n*Pi)).

%D M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 2.

%H Harry J. Smith, <a href="/A062360/b062360.txt">Table of n, a(n) for n = 0..100</a>

%H M. Abramowitz and I. A. Stegun, eds., <a href="http://www.convertit.com/Go/ConvertIt/Reference/AMS55.ASP">Handbook of Mathematical Functions</a>, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

%o (PARI) for(n=0,23,print(floor(exp(1)^(n*Pi))))

%o (PARI) { default(realprecision, 200); e=exp(1); for (n=0, 100, write("b062360.txt", n, " ", floor(e^(n*Pi))) ) } \\ _Harry J. Smith_, Aug 06 2009

%Y Cf. A121905 (ceiling).

%K easy,nonn

%O 0,2

%A _Jason Earls_, Jul 06 2001