2230928700

Appears in sequences

• Least common multiple of {b(1),...,b(n)}, where b(k) = k(k+1)(2k+1)/6 = A000330(k).at n=11A051538
• a(n) = LCM { Catalan(0), ..., Catalan(n) }.at n=13A051575
• 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=25A091861
• a(0) = 0, a(1) = 1 and a(n) = 6*a(n-1)/(n-1) + 4*a(n-2) for n > 1.at n=25A305032
• a(n) is the denominator of the rational part of Sum_{k>=n} binomial(2*k,k-n)^(-1).at n=14A309001