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 A049071 Expansion of x*(3-2*x)/(1-x^2). 1
 0, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3, -2, 3 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS B. R. Myers, On Spanning Trees, Weighted Compositions, Fibonacci Numbers, and Resistor Networks, SIAM Rev., 17 (1975), 465-474. Index entries for linear recurrences with constant coefficients, signature (0,1). FORMULA a(n) = (1-5*(-1)^n)/2 for n>0. - Colin Barker, Jun 09 2015 a(n) = a(n-2) for n>2. - Colin Barker, Jun 09 2015 MATHEMATICA CoefficientList[Series[x (3-2x)/(1-x^2), {x, 0, 150}], x]  (* Harvey P. Dale, Mar 23 2011 *) PROG (PARI) Vec(x*(3-2*x)/(1-x^2)+O(x^99)) \\ Charles R Greathouse IV, Sep 27 2012 CROSSREFS Sequence in context: A097509 A095206 A308006 * A168330 A176059 A262785 Adjacent sequences:  A049068 A049069 A049070 * A049072 A049073 A049074 KEYWORD sign,easy AUTHOR STATUS approved

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Last modified July 18 19:00 EDT 2019. Contains 325144 sequences. (Running on oeis4.)