4128448

Appears in sequences

• Primitive weird numbers: weird numbers with no proper weird divisors.at n=31A002975
• Primitive weird numbers of the form 2^k*p*q with k > 0 and where p < q are odd primes.at n=21A258882
• Least primitive weird number, pwn, (A002975) whose abundance is divisible by the n-th prime (A000040), or 0 if no such pwn exists.at n=6A265728
• G.f. satisfies: A(x)^2 = A( x^2/(1 - 4*x + 2*x^2) ).at n=12A274484