2042040

Appears in sequences

• Denominators of coefficients for numerical differentiation.at n=17A002548
• Increasing values of A000793 (largest order of permutation of n elements).at n=37A002809
• Areas of more than one primitive Pythagorean triangle.at n=14A024407
• a(n) = n*(n^4-1)/2.at n=19A027484
• a(n) = 7*(n+1)*binomial(n+3,7).at n=10A027792
• a(n) = 22*(n+1)*binomial(n+3,12).at n=5A027797
• a(n) = LCM of Fibonacci sequence {F_1,...,F_n}.at n=9A035105
• Maximal order of element of alternating group A_{2n}.at n=33A057742
• Maximal order of element of alternating group A_{2n+1}.at n=33A057743
• Denominators of partial sums of reciprocals of lcm(1..n) = A003418(n).at n=16A064858
• The sequence f(1), f(2), ... as defined in A068192.at n=7A066631
• n! divided by product of factorials of all proper divisors of n, as n runs through the values for which the result is an integer.at n=17A075071
• Integers n for which the ratio phi(n)/pi(n) is smaller than for any subsequent n. Here phi(n) is Euler's totient function and pi(n) is the number of primes that are at most n.at n=36A080289
• Largest n-round number.at n=4A089016
• 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=17A091861
• Least number that can be expressed as the difference of the squares of primes in exactly n distinct ways.at n=25A092204
• Denominators of row sums in triangle described in A093412.at n=17A093419
• Denominator of -3*n + 2*(1+n)*HarmonicNumber(n).at n=18A096620
• Least integer "mod 2 prime signatures" k ordered by number of primitive Pythagorean triples with leg = k.at n=43A097275
• Denominator of Sum_{k=0..n} 1/C(3*n, 3*k).at n=6A100515