A083268 a(n) is the lcm of related numbers to n (counted in A073757): related = {divisor-set, RRS}.

1, 2, 6, 12, 60, 30, 420, 840, 2520, 630, 27720, 4620, 360360, 90090, 120120, 720720, 12252240, 1531530, 232792560, 58198140, 77597520, 29099070, 5354228880, 892371480, 26771144400, 3346393050, 80313433200, 20078358300, 2329089562800

Offset

1,2

Links

Table of n, a(n) for n=1..29.

Formula

a(n) = lcm(n, A038610(n)).

Example

n=10: related terms = {1,2,5,10,3,7,9,}; lcm(10,1,3,7,9) = 630 = a(10).

Prog

(PARI) a(n)=my(t=lcm([1..n])/n, g); while((g=gcd(t, n))>1, t/=g); t*n \\ Charles R Greathouse IV, Nov 14 2014

Crossrefs

Cf. A073757 (count), A083266 (sum), A083268 (LCM), A083267 (product), A038610.

Sequence in context: A117481 A343277 A341617 * A368901 A225628 A284650

Adjacent sequences: A083265 A083266 A083267 * A083269 A083270 A083271

Keyword

nonn

Author

Labos Elemer, May 13 2003

Status

approved