OFFSET
0,1
COMMENTS
a(n) = sum of row n+1 of triangle A249307. - Reinhard Zumkeller, Nov 14 2014
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (5).
FORMULA
a(n) = 5*a(n-1), n>0; a(0)=7. G.f.: 7/(1-5*x). - Philippe Deléham, Nov 23 2008
E.g.f.: 7*e^(5*x). - Mohammad K. Azarian, Jan 15 2009
MATHEMATICA
7*5^Range[0, 100] (* Vladimir Joseph Stephan Orlovsky, Jun 09 2011 *)
NestList[5#&, 7, 30] (* Harvey P. Dale, Sep 28 2015 *)
PROG
(Magma) [7*5^n: n in [0..20]]; // Vincenzo Librandi, Sep 15 2011
(Haskell)
a005055 = (* 7) . (5 ^)
a005055_list = iterate (* 5) 7 -- Reinhard Zumkeller, Nov 14 2014
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved