700131600

Appears in sequences

• Denominators of the triangle of coefficients T(n,k), read by rows, that satisfy: y^x = Sum_{n=0..x} R_n(y)*x^n for all nonnegative integers x, y, where R_n(y) = Sum_{k=0..n} T(n,k)*y^k and T(n,k) = A107045(n,k)/a(n,k).at n=31A107046
• Number of (n+2)X8 binary arrays avoiding patterns 001 and 011 in rows and columns.at n=8A202098
• Numbers n such that phi(sigma(k))/sigma(phi(k)) < phi(sigma(n))/sigma(phi(n)) for all k < n and n is the smallest positive integer with this property.at n=13A227927
• Number of (n+1)X(7+1) 0..1 arrays with nondecreasing sum of every two consecutive values in every row and column.at n=9A250431
• Numbers n such that phi(sigma(n))/n > phi(sigma(m))/m for all m < n, where sigma is the sum of divisors function (A000203) and phi is Euler's totient function (A000010).at n=18A293708