OFFSET
0,2
LINKS
Amiram Eldar, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,2,0,0,0,0,0,0,-1).
FORMULA
a(n) = n*7/gcd(n, 7).
Sum_{k=1..n} a(k) ~ (43/14) * n^2. - Amiram Eldar, Nov 26 2022
Sum_{n>=1} (-1)^(n+1)/a(n) = 13*log(2)/49. - Amiram Eldar, Sep 08 2023
MATHEMATICA
LCM[Range[0, 100], 7] (* Wesley Ivan Hurt, Nov 17 2022 *)
PROG
(Sage) [lcm(n, 7)for n in range(0, 57)] # Zerinvary Lajos, Jun 09 2009
(Magma) [Lcm(n, 7): n in [0..100]]; // Vincenzo Librandi, Apr 18 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Mitch Harris, Jun 18 2005
STATUS
approved