A sound sequence?
Level
pending
Find the next term of this sequence: 1,2,6,12,60,60,420,840
The answer is 2520.
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1 solution
The the nth term is gcd(1,2,3,...,n) gcd(1)=1, gcd(1,2)=2, gcd(1,2,3)=6 etc
This gives gcd(1,2,3,4,5,6,7,8,9) or 840*3= 2520 as the solution.