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%I #11 Apr 15 2024 20:13:56
%S 0,0,4,12,34,110,354,1120,3552,11290,35862,113884,361702,1148810,
%T 3648670,11588338,36805222,116895404,371266018,1179160836,3745078428,
%U 11894570660,37777796510,119984315496,381076645196,1210319938646,3844041278068,12208882029838
%N The sequence d[n] defined in A126940.
%C Linear recurrence and empirical g.f confirmed for more terms. - _Ray Chandler_, Mar 07 2024
%H Ray Chandler, <a href="/A126948/b126948.txt">Table of n, a(n) for n = 0..1993</a>
%H <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (2, 1, 7, 4, 4, 1).
%F Empirical g.f.: -2*x^2*(x^3+3*x^2+2*x+2) / (x^6+4*x^5+4*x^4+7*x^3+x^2+2*x-1). - _Colin Barker_, Apr 08 2013
%t LinearRecurrence[{2,1,7,4,4,1},{0,0,4,12,34,110},40] (* _Harvey P. Dale_, Apr 15 2024 *)
%K nonn,changed
%O 0,3
%A _N. J. A. Sloane_, Mar 18 2007
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