419840

Appears in sequences

• Expansion of 1/((1-2*x)*(1-6*x)).at n=7A016129
• Triangle of Legendre-Stirling numbers of the second kind T(n,j), n >= 1, 1 <= j <= n, read by rows.at n=37A071951
• Where records occur in A063574.at n=14A075662
• Triangle of scaled second column sequences of (k,k)-Stirling2 arrays.at n=37A091039
• Expansion of x*(1+4*x-4*x^2)/((1+2*x)*(1-6*x)*(1-8*x^2)).at n=7A095897
• Triangle read by rows of Legendre-Stirling numbers of the second kind.at n=43A191935
• Q-residue of the coefficient triangle (A076699) of the cyclotomic polynomials, where Q is the triangular array (t(i,j)) given by t(i,j)=1. (See Comments.)at n=20A193650
• Composite numbers m such that Product_{i=1..k} (p_i/(p_i-1)) / Sum_{i=1..k} (p_i/(p_i+1)) is an integer, where p_i are the k prime factors of m (with multiplicity).at n=22A230112