OFFSET
0,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,-1).
FORMULA
a(n) = n*11/gcd(n, 11).
G.f.: 11*x/(1-x)^2 - 110*x^11/(1-x^11)^2. - Robert Israel, May 28 2014
From Amiram Eldar, Nov 26 2022: (Start)
Sum_{k=1..n} a(k) ~ (111/22) * n^2. (End)
Sum_{n>=1} (-1)^(n+1)/a(n) = 21*log(2)/121. - Amiram Eldar, Sep 08 2023
MAPLE
seq(ilcm(n, 11), n=0..100); # Robert Israel, May 28 2014
MATHEMATICA
LCM[#, 11]&/@Range[0, 60] (* Harvey P. Dale, Mar 13 2011 *)
PROG
(Sage) [lcm(n, 11)for n in range(0, 54)] # Zerinvary Lajos, Jun 09 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mitch Harris, Jun 18 2005
STATUS
approved