A038797 T(n+4,n), array T as in A038792.
1, 6, 23, 73, 211, 581, 1560, 4135, 10890, 28590, 74946, 196326, 514123, 1346148, 3524441, 9227311, 24157645, 63245795, 165579930, 433494205, 1134902916, 2971214796, 7778741748, 20365010748, 53316290821, 139583862066, 365435295755, 956722025605, 2504730781495
Offset: 0
Links
- Stefano Spezia, Table of n, a(n) for n = 0..2300
- Index entries for linear recurrences with constant coefficients, signature (6,-13,13,-6,1).
Programs
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Mathematica
CoefficientList[Series[1/((1-3*x+x^2)*(1-x)^3),{x,0,28}],x] (* Stefano Spezia, Apr 24 2023 *)
Formula
G.f.: 1/((1 - 3*x + x^2)*(1 - x)^3). [Maksym Voznyy (voznyy(AT)mail.ru), Aug 14 2009]
Extensions
Definition corrected by R. J. Mathar, Sep 16 2009