37949472

Appears in sequences

• O.g.f.: Sum_{n>=0} 2^(n^2)*x^n/(1 - 2^n*x)^n.at n=5A171799
• a(n) = n^4*(n+1)^4/8.at n=10A202107
• Numbers k such that k^4 is the sum of two positive 5th powers.at n=19A291852
• Nonprimes k such that sopfr(k) = rad(k), where sopfr(k) is sum of the prime factors of k (counting multiplicity), and rad(k) is the product of its distinct prime factors.at n=31A386916