59455

Appears in sequences

• Numbers k such that Sum_{d|k} sigma(d)/d is an integer.at n=9A068986
• Numbers k such that k^3 divides 19^(k^2) + 1.at n=5A177819
• Squarefree numbers (from A005117) with prime divisors in a 2p+1 progression.at n=16A231966
• Squarefree numbers (A005117) of the form p*q*r*s with prime factors p, q, r, s with q = 2*p + 1, r = 2*q + 1 and s = 2*r + 1.at n=1A231968
• a(n) is the smallest number k such that the symmetric representation of sigma(k) has n parts.at n=12A239663
• G.f. A(x) = Sum_{n>=0} x^n/a(n) satisfies: A(x) = A(x^2) + Integral A(x^2) dx.at n=47A294640
• G.f. A(x) = Sum_{n>=0} x^n/a(n) satisfies: A(x) = A(x^2) + Integral A(x^2) dx.at n=94A294640
• a(n) is the least positive integer that can be expressed as the sum of a prime number and a nonnegative cube in exactly n ways.at n=11A365289
• a(n) is the least positive integer that can be expressed as the sum of a prime number and a positive cube in exactly n ways.at n=11A365290