416215800

Appears in sequences

• Second-order reciprocal Stirling number (Fekete) a(n) = [[2n+2, n]]. The number of n-orbit permutations of a (2n+2)-set with at least 2 elements in each orbit. Also known as associated Stirling numbers of the first kind (e.g., Comtet).at n=6A000907
• Triangle read by rows, giving coefficients in an expansion of absolute values of Stirling numbers of the first kind in terms of binomial coefficients.at n=42A259456
• Least integers of their prime signature (A025487) whose average number of distinct prime factors of their divisors is an integer.at n=21A346015