A008607 Multiples of 25.
0, 25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300, 325, 350, 375, 400, 425, 450, 475, 500, 525, 550, 575, 600, 625, 650, 675, 700, 725, 750, 775, 800, 825, 850, 875, 900, 925, 950, 975, 1000, 1025, 1050, 1075, 1100, 1125, 1150, 1175, 1200, 1225
Offset: 0
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..10000
- Tanya Khovanova, Recursive Sequences
- INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 337
- Luis Manuel Rivera, Integer sequences and k-commuting permutations, arXiv preprint arXiv:1406.3081 [math.CO], 2014-2015.
- Index entries for linear recurrences with constant coefficients, signature (2,-1).
Programs
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Mathematica
Range[0, 1500, 25] (* Vladimir Joseph Stephan Orlovsky, Jun 01 2011 *) 25*Range[0,50] (* Harvey P. Dale, Jul 28 2020 *)
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PARI
a(n)=25*n \\ Charles R Greathouse IV, Oct 07 2015
Formula
G.f.: 25*x/(1-x)^2. - Colin Barker, Feb 19 2012
From Wesley Ivan Hurt, May 19 2024: (Start)
a(n) = 25*n.
a(n) = 2*a(n-1) - a(n-2). (End)
E.g.f.: 25*x*exp(x). - Stefano Spezia, Oct 18 2024