

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
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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



KEYWORD

easy,nonn


AUTHOR



EXTENSIONS



STATUS

approved



