5969040

Appears in sequences

• Numbers that can be expressed as the difference of the squares of primes in exactly twenty-one distinct ways.at n=3A092017
• a(n) = denominator of the sum of reciprocals of those positive integers which are <= n and are not among the first (n-1) terms of A130502.at n=19A130503
• a(n) = gcd(n!, binomial(2n,n)).at n=29A135322
• Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=13.at n=9A145634
• a(n) = binomial(2*n, n) / Product(p prime | n < p <= 2*n).at n=29A263931
• Numbers n such that the multiplicative group modulo n is the direct product of 8 cyclic groups.at n=26A272598
• Triangle read by rows in which row(n) = {T(n, k)} is the lexicographically earliest list of n numbers such that adding 1 to some T(n, k) gives a row of numbers each divisible by prime(k).at n=33A286947
• Pentagonal numbers that are products of smaller pentagonal numbers.at n=18A374372