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 A175005 Expansion of x/(1 - 4*x + 3*x^2 - 2*x^3). 1
 0, 1, 4, 13, 42, 137, 448, 1465, 4790, 15661, 51204, 167413, 547362, 1789617, 5851208, 19130705, 62548430, 204504021, 668632204, 2186113613, 7147565882, 23369187097, 76406277968, 249812682345, 816770269670, 2670455587581 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS The limiting ratio a(n+1)/a(n) is  3.269530842081143.... LINKS Index entries for linear recurrences with constant coefficients, signature (4,-3,2). FORMULA a(n) = 4*a(n-1) - 3*a(n-2) + 2*a(n-3), starting 0, 1, 4. PROG (PARI) Vec(x/(1-4*x+3*x^2-2*x^3)+O(x^99)) \\ Charles R Greathouse IV, Sep 26 2012 CROSSREFS Cf. A000045, A174631, A000931, A111285. Sequence in context: A277667 A274952 A010900 * A070031 A082989 A267240 Adjacent sequences:  A175002 A175003 A175004 * A175006 A175007 A175008 KEYWORD nonn,easy AUTHOR Roger L. Bagula, Dec 02 2010 STATUS approved

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Last modified May 29 20:42 EDT 2020. Contains 334710 sequences. (Running on oeis4.)