316680

Appears in sequences

• (1+e)-harmonic numbers: harmonic mean of (1+e)-divisors is an integer.at n=24A053783
• Numbers that can be expressed as the difference of the squares of primes in exactly thirteen distinct ways.at n=1A092009
• Numbers with prime factorization p*q*r*s*t*u^3 (where p, q, r, s, t, u are distinct primes).at n=12A190378
• Numbers n such that the multiplicative group modulo n is the direct product of 7 cyclic groups.at n=13A272597
• Number T(n,k) of colored set partitions of [n] where exactly k colors are used for the elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=25A323099
• Integers x such that there exist two integers 0<x<=y<=z such that psi(x) = psi(y) = psi(z) = x + y + z.at n=7A385852
• Integers y such that there exist two integers 0<x<=y<=z such that psi(x) = psi(y) = psi(z) = x + y + z.at n=6A386901