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A027116 a(n) = A027113(n, n+3). 0

%I

%S 7,23,56,120,241,467,886,1660,3087,5715,10552,19452,35825,65943,

%T 121342,223240,410663,755391,1389448,2555664,4700673,8645963,15902486,

%U 29249316,53797967,98949979,181997480,334745652,615693345

%N a(n) = A027113(n, n+3).

%F Conjectures from _Colin Barker_, Feb 20 2016: (Start)

%F a(n) = 3*a(n-1)-2*a(n-2)-a(n-4)+a(n-5) for n>7.

%F G.f.: x^3*(7+2*x+x^2-2*x^3) / ((1-x)^2*(1-x-x^2-x^3)).

%F (End)

%K nonn

%O 3,1

%A _Clark Kimberling_

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Last modified February 17 21:35 EST 2020. Contains 332006 sequences. (Running on oeis4.)