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A135042 a(n) = 5*(n - 1) for n >= 2; a(0) = 1, a(1) = 2.

%I A135042 #34 Jun 30 2023 15:13:27
%S A135042 1,2,5,10,15,20,25,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,
%T A135042 110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,
%U A135042 195,200,205,210,215,220,225,230,235,240,245,250
%N A135042 a(n) = 5*(n - 1) for n >= 2; a(0) = 1, a(1) = 2.
%H A135042 G. C. Greubel, <a href="/A135042/b135042.txt">Table of n, a(n) for n = 0..1000</a>
%H A135042 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1).
%F A135042 a(n) = 2*a(n-1) - a(n-2), n > 3. - _R. J. Mathar_, Apr 21 2010, corrected Sep 02 2010
%F A135042 G.f.: (1 + 2*x^2 + 2*x^3)/(1-x)^2. - _Colin Barker_, Feb 01 2012
%F A135042 From _G. C. Greubel_, Sep 18 2016: (Start)
%F A135042 a(n) = 5*(n - 1) for n >= 2.
%F A135042 E.g.f.: 5*(-1 + x)*exp(x) + 2*(3 + x). (End)
%t A135042 Join[{1,2}, Table[5*(n-1), {n,2,25}]] (* _G. C. Greubel_, Sep 18 2016 *)
%o A135042 (Magma) [1,2] cat [5*(n-1): n in [2..50]]; // _Vincenzo Librandi_, Sep 18 2016
%Y A135042 Cf. A008587.
%K A135042 nonn,easy
%O A135042 0,2
%A A135042 _Gary W. Adamson_, May 10 2008
%E A135042 Offset corrected, and one 75 replaced with 65, by _R. J. Mathar_, Apr 21 2010
%E A135042 Meaningful name using formula by _G. C. Greubel_ from _Joerg Arndt_, Jun 30 2023