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Search: id:A001713
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| A001713 |
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Generalized Stirling numbers.
(Formerly M5060 N2190)
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+0
3
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| 1, 18, 245, 3135, 40369, 537628, 7494416, 109911300, 1698920916, 27679825272, 474957547272, 8572072384512, 162478082312064, 3229079010579072, 67177961946534528, 1460629706845766400, 33139181950164806400
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Oct 20 2009: (Start)
The asymptotic expansion of the higher order exponential integral E(x,m=4,n=3) ~ exp(-x)/x^4*(1 - 18/x + 245/x^2 - 3135/x^3 + 40369/x^4 - 537628/x^5 + ... ) leads to the sequence given above. See A163931 and A163934 for more information.
(End)
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REFERENCES
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Mitrinovic, D. S.; Mitrinovic, R. S.; Tableaux d'une classe de nombres relies aux nombres de Stirling. Univ. Beograd. Publ. Elektrotehn. Fak. Ser. Mat. Fiz. No. 77 1962, 77 pp.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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FORMULA
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E.g.f.: (ln(1-x)/(x-1))^3/6. - Vladeta Jovovic (vladeta(AT)eunet.rs), May 05 2003
a(n)=sum((-1)^(n+k)*binomial(k+3, 3)*3^k*stirling1(n+3, k+3), k=0..n). - Borislav Crstici (bcrstici(AT)etv.utt.ro), Jan 26 2004
If we define f(n,i,a)=sum(binomial(n,k)*stirling1(n-k,i)*product(-a-j,j=0..k-1),k=0..n-i), then a(n-3) = |f(n,3,3)|, for n>=3. [From Milan R. Janjic (agnus(AT)blic.net), Dec 21 2008]
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CROSSREFS
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Cf. A000254, A001706, A001719.
Sequence in context: A081203 A016294 A153593 this_sequence A110395 A153600 A016183
Adjacent sequences: A001710 A001711 A001712 this_sequence A001714 A001715 A001716
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), May 05 2003
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