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A099530 Expansion of 1/(1-x+x^4). 3


%S 1,1,1,1,0,-1,-2,-3,-3,-2,0,3,6,8,8,5,-1,-9,-17,-22,-21,-12,5,27,48,

%T 60,55,28,-20,-80,-135,-163,-143,-63,72,235,378,441,369,134,-244,-685,

%U -1054,-1188,-944,-259,795,1983,2927,3186,2391,408,-2519,-5705,-8096,-8504,-5985,-280,7816,16320,22305,22585,14769

%N Expansion of 1/(1-x+x^4).

%C Binomial transform of A099531.

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,-1).

%F a(n)=a(n-1)-a(n-4); a(n)=sum{k=0..floor(n/4), binomial(n-3k, k)(-1)^k}.

%Y Cf. A050935.

%K easy,sign

%O 0,7

%A _Paul Barry_, Oct 20 2004

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Last modified October 26 11:10 EDT 2021. Contains 348267 sequences. (Running on oeis4.)