11639628

Appears in sequences

• a(n) = LCM(1,2,...,n) / n.at n=19A002944
• Duplicate of A002944.at n=19A081529
• Denominator of 2*Sum(C(n,w)/w,w=1..n/2-1)+C(n, n/2)/(n/2) if n is even otherwise of 2*Sum(C(n,w)/w,w=1..(n-1)/2).at n=36A085572
• Denominator of 2*Sum(C(n,w)/w,w=1..n/2-1)+C(n, n/2)/(n/2) if n is even otherwise of 2*Sum(C(n,w)/w,w=1..(n-1)/2).at n=37A085572
• Given (1) f(h,j,a) = ( [ ((a/gcd(a,h)) / gcd(j+1,(a/gcd(a,h)))) * (h(j+1)) ] - [ ((a/gcd(a,h)) / gcd(j+1,(a/gcd(a,h)))) * (ja) ] ) / a then let (2) a(h) = d(h,j) = lcm( f(h,j,1) ... f(h,j,h) ).at n=9A091342
• a(n) = lcm_{k=1..n} (lcm(n,n-1,...,n-k+2,n-k+1)/lcm(1,2,...,k)).at n=18A093432
• Denominator of the sum of all elements in the n X n Hilbert matrix M(i,j) = 1/(i+j-1), where i,j = 1..n.at n=9A117664
• Denominators of partial sums of the alternating series of inverse central binomial coefficients.at n=10A145556
• Denominators of b(n) = b(n-1)/2 + 1/(2*n), b(0)=0.at n=19A241519
• Denominator of the product of n and the n-th harmonic alternating number, Sum_{k=1..n} (-1)^(k+1)/k.at n=19A334721
• a(n) = lcm(denominator(p(n, x))), where p(n, x) are the rational polynomials defined in A342321.at n=18A343277
• Numbers that when concatenated with the natural numbers from 1 to N are divisible by the corresponding order number.at n=9A360830
• Expansion of e.g.f. exp( Sum_{k>=0} x^(4*k+5) / (4*k+5)! ).at n=19A365898