38798760

Appears in sequences

• a(n) = (2n+3)! /( n! * (n+1)! ).at n=9A000911
• a(n) = 11*(n+1)*binomial(n+2,11)/2.at n=10A027784
• Numbers k which, for some r, are r-digit maximizers of k/phi(k).at n=19A065800
• The sequence f(1), f(2), ... as defined in A068192.at n=8A066631
• Smallest multiple of n with n distinct prime divisors.at n=7A076926
• a(1) = 1; a(n) = smallest positive unpicked integer such that n-k divides evenly into a(n)*a(k) for every k, 1 <= k <= n-1.at n=21A091861
• Denominator of partial sums of a certain series.at n=9A101029
• Least modulus with 2^n square roots of 1.at n=9A102476
• Denominator of Sum_{i=1..n} 1/C(2*i,i).at n=10A112098
• Denominators of partial sums for a series for 2*Pi*sqrt(3)/9.at n=10A130554
• a(n) = LCM of the integers b(k), over all k where 1 <= k <= n, where b(k) = the k-th integer from among those positive integers which are coprime to (n+1-k).at n=10A132421
• Numbers with exactly 8 distinct prime divisors {2,3,5,7,11,13,17,19}.at n=3A147575
• For all sufficiently high values of k, d(n^k) > d(m^k) for all m < n. (Let k, m, and n represent positive integers only.)at n=35A168264
• a(n) = n!*(floor(n/30))!/((floor(n/2))!*(floor(n/3))!*(floor(n/5))!).at n=20A211418
• Denominator of the average number of move operations required by an insertion sort of n (distinct) elements.at n=19A212397
• a(n) = 132*binomial(n,12).at n=21A213380
• Triangle T(n,k) giving denominator of integral_{x=0..1} B(n,x)*B(k,x) dx, B = Bernoulli polynomial, n >= 1, 1 <= k <= n.at n=44A225750
• a(n) is the smallest number m such that the multiplicative group modulo m is the direct product of n cyclic groups.at n=8A272590
• Numbers n such that the multiplicative group modulo n is the direct product of 9 cyclic groups.at n=0A272599
• Least number with the prime signature of 2^n - 1.at n=35A278240