10628640

Appears in sequences

• Unsigned Stirling numbers of first kind, s(n+1,2): a(n+1) = (n+1)*a(n) + n!.at n=10A000254
• a(n) = (Product k) * (Sum 1/k), where both the product and the sum are over those positive integers k, where k <= n and gcd(k,n) = 1.at n=10A056855
• A triangle of generalized Stirling numbers: sum of consecutive terms in the harmonic sequence multiplied by the product of their denominators.at n=55A067176
• Sum of all n-digit Stirling numbers of first kind.at n=7A131014
• The number of n-permutations having precisely two cycles whose lengths are relatively prime.at n=9A194364
• (n-1)-st elementary symmetric function of the first n terms of (2,1,4,3,6,5,8,7,...)=A103889.at n=9A203196
• Odd numbered terms of the sequence whose n-th term is the (n-1)-st elementary symmetric function of (i, 2i, 3i, ..., ni), where i=sqrt(-1).at n=4A203239
• Triangle read by rows: coefficients of harmonic-geometric polynomials.at n=54A222057
• Triangle read by rows: coefficients of harmonic-geometric polynomials.at n=65A222060
• Irregular triangular array read by rows. T(n,k) is the number of n-permutations with exactly k distinct cycle lengths; n>=1, 1<=k<=floor( (-1+(1+8n)^(1/2))/2 ).at n=25A224211
• Expansion of e.g.f. -log(1 - x)*arctanh(x).at n=11A302611
• T(n, k) = [x^k] Pochhammer(x, n-k) for n >= 0, 0 <= k <= floor(n/2). Irregular triangle read by rows.at n=51A331327