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Search: id:A055867
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| 0, 0, 0, 64, 750, 10584, 175616, 3359232, 72900000, 1771561000, 47692136448, 1409582685888, 45392319784448, 1582328671875000, 59373627899904000, 2386420683693101056, 102303226385042448384, 4659806991485780193672
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OFFSET
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1,4
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FORMULA
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a(i)=0 for i=1, 2, 3; a(n)= n^3*(n+1)^(n-4), n >= 4.
E.g.f.: (9*W(-x)^2-14*W(-x)^3+3*W(-x)^4-9*x^2-32*x^3-81*x^4)/(72*x), W(x) principal branch of Lambert's function.
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CROSSREFS
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a(n)=A055864(n, 4). Cf. A000272, A055865, A055070, A055866, A055858.
Sequence in context: A030516 A056573 A108538 this_sequence A027003 A000818 A016959
Adjacent sequences: A055864 A055865 A055866 this_sequence A055868 A055869 A055870
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KEYWORD
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nonn,easy
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Jun 20 2000
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