230481

Appears in sequences

• Coefficient of x^(2*n+1) in arctanh(x)/sqrt(1-x^2), multiplied by (2*n+1)!.at n=4A028353
• Triangle T(n,k) of coefficients of Meixner polynomials of degree n, k=0..n.at n=53A060338
• Triangle read by rows: T(n,k) = number of degree-n permutations with k odd cycles, k=0..n, n >= 0.at n=46A060524
• Triangle M(k,n) read by rows: coefficients of Meixner polynomials.at n=28A094368
• Numbers n such that the sum of the divisors of n is of the form m^2+1.at n=12A289290