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A081679
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a(n)=(6^n-5^n-4^n-3^n+4*2^n)/2.
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1
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1, 1, 1, 16, 199, 1756, 13231, 91876, 608959, 3922396, 24798511, 154802836, 957674719, 5885660236, 35993747791, 219289723396, 1332092132479, 8073205753276, 48838076777071, 295005107805556, 1779844007102239
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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COMMENTS
| Inverse binomial transform of A081680
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (20,-155,580,-1044,720). - Bruno Berselli, Dec 15 2010
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FORMULA
| G.f.: (1-19*x+136*x^2-429*x^3+498*x^4)/((1-2*x)*(1-3*x)*(1-4*x)*(1-5*x)*(1-6*x)). - Bruno Berselli, Dec 15 2010
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CROSSREFS
| Sequence in context: A153885 A016226 A154240 * A154249 A125451 A154348
Adjacent sequences: A081676 A081677 A081678 * A081680 A081681 A081682
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KEYWORD
| easy,nonn
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Mar 30 2003
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