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Multiples of 25.
12

%I #50 Oct 18 2024 18:08:30

%S 0,25,50,75,100,125,150,175,200,225,250,275,300,325,350,375,400,425,

%T 450,475,500,525,550,575,600,625,650,675,700,725,750,775,800,825,850,

%U 875,900,925,950,975,1000,1025,1050,1075,1100,1125,1150,1175,1200,1225

%N Multiples of 25.

%H Vincenzo Librandi, <a href="/A008607/b008607.txt">Table of n, a(n) for n = 0..10000</a>

%H Tanya Khovanova, <a href="http://www.tanyakhovanova.com/RecursiveSequences/RecursiveSequences.html">Recursive Sequences</a>

%H INRIA Algorithms Project, <a href="http://ecs.inria.fr/services/structure?nbr=337">Encyclopedia of Combinatorial Structures 337</a>

%H Luis Manuel Rivera, <a href="http://arxiv.org/abs/1406.3081">Integer sequences and k-commuting permutations</a>, arXiv preprint arXiv:1406.3081 [math.CO], 2014-2015.

%H <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (2,-1).

%F G.f.: 25*x/(1-x)^2. - _Colin Barker_, Feb 19 2012

%F From _Wesley Ivan Hurt_, May 19 2024: (Start)

%F a(n) = 25*n.

%F a(n) = 2*a(n-1) - a(n-2). (End)

%F E.g.f.: 25*x*exp(x). - _Stefano Spezia_, Oct 18 2024

%t Range[0, 1500, 25] (* _Vladimir Joseph Stephan Orlovsky_, Jun 01 2011 *)

%t 25*Range[0,50] (* _Harvey P. Dale_, Jul 28 2020 *)

%o (PARI) a(n)=25*n \\ _Charles R Greathouse IV_, Oct 07 2015

%Y Cf. A008605, A008606.

%K nonn,easy

%O 0,2

%A _N. J. A. Sloane_