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A070293 a(n) = lcm(30,n)/gcd(30,n). 3
30, 15, 10, 30, 6, 5, 210, 60, 30, 3, 330, 10, 390, 105, 2, 120, 510, 15, 570, 6, 70, 165, 690, 20, 30, 195, 90, 210, 870, 1, 930, 240, 110, 255, 42, 30, 1110, 285, 130, 12, 1230, 35, 1290, 330, 6, 345, 1410, 40, 1470, 15 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
Sum_{k=1..n} a(k) ~ (1919/360)*n^2. - Amiram Eldar, Oct 07 2023
MATHEMATICA
Table[LCM[30, n]/GCD[30, n], {n, 50}] (* Harvey P. Dale, Apr 17 2011 *)
CROSSREFS
Sequence in context: A147077 A263927 A033350 * A194709 A070657 A089332
KEYWORD
easy,nonn
AUTHOR
Amarnath Murthy, May 10 2002
EXTENSIONS
More terms from Harvey P. Dale, Apr 17 2011
STATUS
approved

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Last modified May 30 14:34 EDT 2024. Contains 372968 sequences. (Running on oeis4.)