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A011926
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[ n(n-1)(n-2)(n-3)/16 ].
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0
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0, 0, 0, 0, 1, 7, 22, 52, 105, 189, 315, 495, 742, 1072, 1501, 2047, 2730, 3570, 4590, 5814, 7267, 8977, 10972, 13282, 15939, 18975, 22425, 26325, 30712, 35626, 41107, 47197, 53940, 61380, 69564, 78540
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,6
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (5,-10,10,-6,6,-10,10,-5,1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 15 2010]
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FORMULA
| a(n) = +5*a(n-1) -10*a(n-2) +10*a(n-3) -6*a(n-4) +6*a(n-5) -10*a(n-6) +10*a(n-7) -5*a(n-8) +a(n-9). G.f.: x^4*(x^4+1+2*x-3*x^2+2*x^3) / ((1-x)^5*(x^4+1) ). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 15 2010]
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CROSSREFS
| Sequence in context: A184629 A041215 A060822 * A101120 A151717 A188377
Adjacent sequences: A011923 A011924 A011925 * A011927 A011928 A011929
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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