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%I #7 Jun 13 2015 00:51:00
%S 1,1,-1,19,467,5611,53459,455659,3648707,28119691,211372019,
%T 1562038699,11405181347,82545287371,593501306579,4245828252139,
%U 30255066944387,214924122640651,1522971386761139,10770190567911979,76039651374633827,536127709619251531
%N A sum of decreasing powers.
%C Binomial transform of A081685
%H <a href="/index/Rec">Index entries for linear recurrences with constant coefficients</a>, signature (25,-245,1175,-2754,2520).
%F a(n)=7^n-6^n-5^n-4^n+3*3^n.
%F G.f.: -(1326*x^4-886*x^3+219*x^2-24*x+1)/((3*x-1)*(4*x-1)*(5*x-1)*(6*x-1)*(7*x-1)). [_Colin Barker_, Sep 07 2012]
%Y Cf. A081687.
%K easy,sign
%O 0,4
%A _Paul Barry_, Mar 30 2003
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