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2^(n-1)*(n^2+2n+2).
2

%I #9 Mar 15 2016 23:00:23

%S 1,5,20,68,208,592,1600,4160,10496,25856,62464,148480,348160,806912,

%T 1851392,4210688,9502720,21299200,47448064,105119744,231735296,

%U 508559360,1111490560,2420113408,5251268608,11358175232,24494735360

%N 2^(n-1)*(n^2+2n+2).

%C Binomial transform of A084849. a(n)=A014477(n-1)+A001787(n+1).

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (6,-12,8).

%F G.f.: (1 - x+2x^2)/(1 - 2x)^3.

%F Equals A134083 * [1,2,3,...]. - _Gary W. Adamson_, Oct 07 2007

%t LinearRecurrence[{6,-12,8},{1,5,20},40] (* _Harvey P. Dale_, Mar 15 2016 *)

%Y Cf. A134083.

%K easy,nonn

%O 0,2

%A _Paul Barry_, Jun 09 2003