156519

Appears in sequences

• Numbers k such that phi(k)*sigma(k) is a cube.at n=30A114077
• a(n) is the smallest positive integer such that d(a(n))*d(a(n)+1) > d(a(n-1))*d(a(n-1)+1), where d(m) is the number of divisors of m and n > 1; a(1) = 1.at n=31A123000
• Expansion of (1/(1 - x)) * Sum_{k>=0} x^(2*k+1) / Product_{j=1..2*k+1} (1 - x^j).at n=42A306145
• Numbers k such that k | A377484(k) and (k+1) | A377484(k+1).at n=0A377949