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A108931 a(2n) = -A106328(n), a(2n+1) = A054488(n). 0

%I

%S 0,1,-3,8,-18,47,-105,274,-612,1597,-3567,9308,-20790,54251,-121173,

%T 316198,-706248,1842937,-4116315,10741424,-23991642,62605607,

%U -139833537,364892218,-815009580,2126747701,-4750223943,12395593988,-27686334078,72246816227

%N a(2n) = -A106328(n), a(2n+1) = A054488(n).

%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,6,0,-1).

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

%p seriestolist(series(x*(2*x-1)*(x-1)/((x^2+2*x-1)*(x^2-2*x-1)), x=0,30)); -or- Floretion Algebra Multiplication Program, FAMP Code: 1jescycrokseq[ + 'jj' + 'kk' + 'ij'] Roktype is set to: Y[sqa.Findk()] = Y[sqa.Findk()] + 1/2;

%Y Cf. A106328, A054488.

%K easy,sign

%O 0,3

%A _Creighton Dement_, Jul 20 2005

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Last modified February 26 15:26 EST 2021. Contains 341632 sequences. (Running on oeis4.)