851760

Appears in sequences

• a(n) = binomial(n+5,5)*(n+3)/3.at n=23A040977
• a(n) = n!*Pell(n) (or n!*A000129(n)).at n=7A052631
• Distribution of maximum inversion table entry.at n=52A056151
• Diagonal of A056151.at n=7A056197
• Composite numbers k such that k - phi(k) divides sigma(k) - k.at n=23A068418
• Composite n such that n reduced mod(phi(n)) = sigma(n) reduced mod(n).at n=22A068495
• Least integer k such that (sigma(k)-k)/(k-phi(k)) = n.at n=3A069714
• Triangle read by rows: T(n,k) = n!*Pell(n-k+1)/k!, where Pell(n)=A000129(n).at n=29A110327
• Triangular sequence defined by T(n, m) = (r^(n-m)*q^m + r^m*q^(n-m))*b(n), where b(n) = coefficients of p(x, n) = 2^n*(1-x)^(n+1) * LerchPhi(x, -n, 1/2), and r=2, q=1.at n=37A154695
• Triangular sequence defined by T(n, m) = (r^(n-m)*q^m + r^m*q^(n-m))*b(n), where b(n) = coefficients of p(x, n) = 2^n*(1-x)^(n+1) * LerchPhi(x, -n, 1/2), and r=2, q=1.at n=43A154695
• Integer areas of the tangential triangles corresponding to the integer-sided triangles with integer areas.at n=16A230361
• Expansion of 140*x*(1 + 4*x + x^2) / (1 - x)^5.at n=11A317984