OFFSET
0,2
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).
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
MATHEMATICA
Range[0, 1500, 25] (* Vladimir Joseph Stephan Orlovsky, Jun 01 2011 *)
25*Range[0, 50] (* Harvey P. Dale, Jul 28 2020 *)
PROG
(PARI) a(n)=25*n \\ Charles R Greathouse IV, Oct 07 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved