Search: id:A001518
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%I A001518 M3669 N1495
%S A001518 1,4,37,559,11776,318511,10522639,410701432,18492087079,943507142461,
%T A001518 53798399207356,3390242657205889,233980541746413697,17551930873638233164,
%U A001518 1421940381306443299981,123726365104534205331511,11507973895102987539130504
%N A001518 Bessel polynomial y_n(3).
%D A001518 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A001518 N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 
               (includes this sequence).
%D A001518 J. Riordan, Combinatorial Identities, Wiley, 1968, p. 77.
%H A001518 T. D. Noe, <a href="b001518.txt">Table of n, a(n) for n=0..100</a>
%H A001518 <a href="Sindx_Be.html#Bessel">Index entries for sequences related to 
               Bessel functions or polynomials</a>
%F A001518 y_n(x) = sum ((n+k)!*(x/2)^k/((n-k)!*k!), k=0..n);
%F A001518 a(n) = 3(2n-1)*a(n-1) + a(n-2). - T. D. Noe, Oct 26, 2006
%Y A001518 Cf. A001515, A001517.
%Y A001518 Polynomial coefficients are in A001498.
%Y A001518 Sequence in context: A123762 A070768 A121080 this_sequence A036245 A097998 
               A155926
%Y A001518 Adjacent sequences: A001515 A001516 A001517 this_sequence A001519 A001520 
               A001521
%K A001518 nonn,easy
%O A001518 0,2
%A A001518 N. J. A. Sloane (njas(AT)research.att.com).

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