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 A076040 (-1)^n * (3^n - 1)/2. 0
 0, -1, 4, -13, 40, -121, 364, -1093, 3280, -9841, 29524, -88573, 265720, -797161, 2391484, -7174453, 21523360, -64570081, 193710244, -581130733, 1743392200, -5230176601, 15690529804, -47071589413, 141214768240, -423644304721, 1270932914164 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Index entries for linear recurrences with constant coefficients, signature (-4,-3). FORMULA A038608 o A003462 =  A033999 * A003462, i.e., a(n) = (-1)^n*A003462(n) = (-1)^A003462(n)*A003462(n) = A038608(A003462(n)). - M. F. Hasler, Oct 21 2014 a(n) = -4*a(n-1)-3*a(n-2). - Colin Barker, Oct 22 2014 G.f.: -x / ((x+1)*(3*x+1)). - Colin Barker, Oct 22 2014 PROG (PARI) concat(0, Vec(-x/((x+1)*(3*x+1)) + O(x^100))) \\ Colin Barker, Oct 22 2014 CROSSREFS Cf. A003462, A033999. Sequence in context: A238846 A025567 A003462 * A091141 A098183 A171556 Adjacent sequences:  A076037 A076038 A076039 * A076041 A076042 A076043 KEYWORD sign,easy AUTHOR M. F. Hasler, Oct 21 2014 EXTENSIONS Former duplicate of A003462 changed to the signed variant by M. F. Hasler, Oct 21 2014 STATUS approved

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Last modified October 21 08:16 EDT 2019. Contains 328292 sequences. (Running on oeis4.)