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a(n)=a(n-2)+a(n-3).
0

%I #5 Jul 18 2017 09:27:52

%S 0,1,4,1,5,5,6,10,11,16,21,27,37,48,64,85,112,149,197,261,346,458,607,

%T 804,1065,1411,1869,2476,3280,4345,5756,7625,10101,13381,17726,23482,

%U 31107,41208,54589,72315,95797

%N a(n)=a(n-2)+a(n-3).

%H <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (0, 1, 1).

%t LinearRecurrence[{0, 1, 1},{0, 1, 4},41] (* _Ray Chandler_, Jul 18 2017 *)

%K nonn

%O 0,3

%A _N. J. A. Sloane_.