131274

Appears in sequences

• a(n) = 3*binomial(2*n, n-1).at n=9A062561
• Row sums of A075652.at n=38A075650
• Smallest multiple of n using all the digits of all its divisors (a permutation of the concatenation of its divisors), or 0 if no such number exists.at n=33A077351
• Sum of root degrees of all symmetric ordered trees with n edges.at n=17A143360
• Minimal covering numbers.at n=51A160559
• Denominators of coefficients in expansion of e.g.f. x / (1 + 2*x - exp(x)).at n=50A347427