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A013715
a(n) = 10^(2*n+1).
7
10, 1000, 100000, 10000000, 1000000000, 100000000000, 10000000000000, 1000000000000000, 100000000000000000, 10000000000000000000, 1000000000000000000000, 100000000000000000000000, 10000000000000000000000000, 1000000000000000000000000000, 100000000000000000000000000000
OFFSET
0,1
COMMENTS
Bisection of A011557 (powers of 10). - Michel Marcus, Jan 17 2016
FORMULA
From Philippe Deléham, Nov 25 2008: (Start)
G.f.: 10/(1-100*x).
a(n) = 100*a(n-1), n>0; a(0)=10. (End)
From Elmo R. Oliveira, Aug 26 2024 (Start)
E.g.f.: 10*exp(100*x).
a(n) = 10*A098608(n) = A011557(A005408(n)) = A013747(n)/10^(n+1). (End)
MAPLE
seq(10^(2*n+1), n=0..11); # Nathaniel Johnston, Jun 25 2011
MATHEMATICA
10^(2 Range[0, 15] + 1) (* Wesley Ivan Hurt, Jan 17 2016 *)
PROG
(Magma) [10^(2*n+1): n in [0..20]]; // Vincenzo Librandi, Jun 26 2011
(PARI) a(n) = 10^(2*n+1); \\ Michel Marcus, Jan 17 2016
(PARI) Vec(10/(1-100*x) + O(x^100)) \\ Altug Alkan, Jan 17 2016
KEYWORD
nonn,easy
STATUS
approved