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Right edge of the triangle in A033291.
3

%I #10 Aug 10 2017 10:15:22

%S 1,4,12,28,50,84,133,192,270,370,484,624,793,980,1200,1456,1734,2052,

%T 2413,2800,3234,3718,4232,4800,5425,6084,6804,7588,8410,9300,10261,

%U 11264,12342,13498,14700,15984,17353,18772,20280,21880,23534,25284,27133,29040

%N Right edge of the triangle in A033291.

%C a(n) = A007980(n-1) * n.

%H <a href="/index/Rec#order_08">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1,2,-4,2,-1,2,-1).

%F G.f.: x*(2*x^5+2*x^4+6*x^3+5*x^2+2*x+1) / ((x-1)^4*(x^2+x+1)^2). - _Colin Barker_, Mar 31 2013

%o (Haskell) See A033291.

%Y Cf. A192735.

%K nonn

%O 1,2

%A _Reinhard Zumkeller_, Jul 08 2011