1616615

Appears in sequences

• Product of 6 successive primes.at n=2A046324
• Number of nonempty subsets of {1,2,...,n} in which exactly 2/5 of the elements are <= (n-3)/3.at n=25A048033
• Squarefree part of lcm(1,...,n).at n=19A056839
• Squarefree part of lcm(1,...,n).at n=20A056839
• Squarefree part of lcm(1,...,n).at n=21A056839
• Squarefree part of lcm(1,...,n).at n=22A056839
• Denominator of Sum_{k=1..n} mu(k)/k.at n=18A070889
• Denominator of Sum_{k=1..n} mu(k)/k.at n=19A070889
• Denominator of Sum_{k=1..n} mu(k)/k when it changes sign.at n=6A070891
• Denominator of b(n) = Sum_{k'<=n} 1/k', where k' denotes the squarefree numbers.at n=20A072983
• For the n-th squarefree number: the product of all primes greater than its smallest factor and less than its largest factor and not dividing it.at n=42A073483
• a(1) = 1; for n>1, a(n) = a(n-1)*n if n is prime, a(n) = a(n-1)/n if n is composite dividing a(n-1) else a(n) = a(n-1).at n=20A085087
• a(1) = 1; for n>1, a(n) = a(n-1)*n if n is prime, a(n) = a(n-1)/n if n is composite dividing a(n-1) else a(n) = a(n-1).at n=19A085087
• a(1) = 1; for n>1, a(n) = a(n-1)*n if n is prime, a(n) = a(n-1)/n if n is composite dividing a(n-1) else a(n) = a(n-1).at n=21A085087
• a(1) = 1; for n>1, a(n) = a(n-1)*n if n is prime, a(n) = a(n-1)/n if n is composite dividing a(n-1) else a(n) = a(n-1).at n=18A085087
• Number of 5-tuples (v1,v2,v3,v4,v5) of nonnegative integers less than n such that v1 <= v4, v1 <= v5, v2 <= v4 and v3 <= v4.at n=24A085462
• Triangle read by rows: T(n,k) = prime(n)#/prime(k)#, 0<=k<=n.at n=38A096334
• Triangle read by rows in which the k-th term in row n (n >= 1, k = 1..n) is Product_{i=0..k-1} prime(n-i).at n=33A098012
• Denominator of 1 - Sum_{i=1..n} Bernoulli(i).at n=19A100650
• Denominator of 1 - Sum_{i=1..n} Bernoulli(i).at n=18A100650