Search: id:A001907
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%I A001907 M3112 N1261
%S A001907 1,3,25,299,4785,95699,2296777,64309755,2057912161,74084837795,
%T A001907 2963393511801,130389314519243,6258687096923665,325451729040030579,
%U A001907 18225296826241712425,1093517809574502745499,69985139812768175711937
%N A001907 Expansion of e^(-x)/(1-4x).
%D A001907 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001907 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001907 J. Riordan, An Introduction to Combinatorial Analysis, Wiley, 1958, p. 
               83.
%D A001907 Michael Z. Spivey and Laura L. Steil, The k-Binomial Transforms and the 
               Hankel Transform, Journal of Integer Sequences, Vol. 9 (2006), Article 
               06.1.1.
%F A001907 Sum[k=0..n, (-1)^(n+k)*C(n, k)*k!*4^k]. - R. Stephan, May 22 2004
%o A001907 (PARI) a(n)=sum(k=0,n,(-1)^(n+k)*binomial(n,k)*k!*4^k)
%Y A001907 Cf. A000166, A000354, A000180, A001908.
%Y A001907 Sequence in context: A126746 A118989 A123989 this_sequence A143635 A023997 
               A154961
%Y A001907 Adjacent sequences: A001904 A001905 A001906 this_sequence A001908 A001909 
               A001910
%K A001907 easy,nonn
%O A001907 0,2
%A A001907 N. J. A. Sloane (njas(AT)research.att.com).
%E A001907 More terms from R. Stephan, May 22 2004
%E A001907 Typo fixed by Charles R Greathouse IV (charles.greathouse(AT)case.edu), 
               Oct 28 2009

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