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A137789
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a(n) = 7^n-6^n-5^n-4^n-3^n-2^n.
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0
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127, 4607, 50479, 446783, 3622207, 28040447, 211134799, 1561328063, 11403051487, 82538901887, 593482158319, 4245770823743, 30254894691967, 214923605948927, 1522969836817039, 10770185918341823, 76039637426447647
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OFFSET
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4,1
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LINKS
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Table of n, a(n) for n=4..20.
Index to sequences with linear recurrences with constant coefficients, signature (27,-295,1665,-5104,8028,-5040).
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FORMULA
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G.f.: x^4*(488880*x^5-572076*x^4+231460*x^3-36445*x^2+1178*x+127)/((2*x-1)*(3*x-1)*(4*x-1)*(5*x-1)*(6*x-1)*(7*x-1)). [Colin Barker, Nov 05 2012]
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MATHEMATICA
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Table[7^n - 6^n - 5^n - 4^n - 3^n - 2^n, {n, 4, 30}] - Stefan Steinerberger, May 02 2008
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CROSSREFS
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Sequence in context: A215611 A176357 A201071 * A005464 A160898 A140477
Adjacent sequences: A137786 A137787 A137788 * A137790 A137791 A137792
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KEYWORD
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nonn,easy
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AUTHOR
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Vladimir Joseph Stephan Orlovsky, Apr 28 2008
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EXTENSIONS
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More terms from Stefan Steinerberger, May 02 2008
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STATUS
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approved
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