Search: id:A046979
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%I A046979
%S A046979 1,1,1,3,1,30,90,630,1,22680,113400,1247400,1,97297200,681080400,
%T A046979 10216206000,1,1389404016000,12504636144000,237588086736000,1,49893498214560000,
%U A046979 548828480360160000,12623055048283680000,1,3786916514485104000000
%N A046979 Denominators of Taylor series for exp(x)*sin(x).
%D A046979 G. W. Caunt, Infinitesimal Calculus, Oxford Univ. Press, 1914, p. 477.
%H A046979 T. D. Noe, <a href="b046979.txt">Table of n, a(n) for n=0..100</a>
%F A046979 a(4n) = 1, a(n) = n!/2^[n/2].
%e A046979 1*x+1*x^2+1/3*x^3-1/30*x^5-1/90*x^6-1/630*x^7+1/22680*x^9+1/113400*x^10+...
%Y A046979 Cf. A046978, A046981, A052277, A007019, A007452, A009775, A092820.
%Y A046979 Absolute values are essentially the same as A007415.
%Y A046979 Sequence in context: A138545 A165624 A120066 this_sequence A141411 A016481 
               A047815
%Y A046979 Adjacent sequences: A046976 A046977 A046978 this_sequence A046980 A046981 
               A046982
%K A046979 nonn,frac,easy,nice
%O A046979 0,4
%A A046979 N. J. A. Sloane (njas(AT)research.att.com).

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