217350

Appears in sequences

• Expansion of 1/(1-4*x)^(21/2).at n=4A020932
• Triangle T(n,k) = number of degree-n permutations with k even cycles, k=0..n.at n=58A060523
• a(n) is the smallest positive integer such that a(n)*(1^n + 2^n + ... + x^n) is a polynomial in x with integer coefficients.at n=44A064538
• a(n) = (2^(n-1)/(2n)!)*Product_{k=1..n} q(k) where q(n) is the denominator of B(2n), the 2n-th Bernoulli number.at n=33A069267
• Denominators of z-sequence for the Sheffer matrix (triangle) A094816 (coefficients of Poisson-Charlier polynomials).at n=44A130190
• a(n) is smallest number with divisors which are congruent to 1, 2, ..., n-1 mod n.at n=45A140539
• a(n) = (1/n!) * (7*n)!/(7*n/2)! * (5*n/2)!/(5*n)!.at n=4A262733
• a(n) is the least positive number whose divisors have all possible residues mod n.at n=45A280171
• Denominators of coefficients in expansion of e.g.f. x / (1 + 2*x - exp(x)).at n=44A347427