646969323

Appears in sequences

• Squarefree part of lcm(1,...,n).at n=29A056839
• Squarefree part of lcm(1,...,n).at n=30A056839
• a(n) = A076926(n)/n.at n=9A076927
• a(n) = product of distinct terms of row n in triangle A255313.at n=13A255427
• a(1) = 1; thereafter a(n) = a(n-1) / lpf(n) if lpf(n) divides a(n-1), otherwise a(n) = a(n-1) * lpf(n), where lpf is the least prime factor function A020639.at n=29A337643
• a(n) = denominator(Sum_{k=1..n} 1/P(k)), where P(k) = A006530(k) is the greatest prime dividing k for k >= 2, and P(1) = 1.at n=28A378679