40195601

Properties

Appears in sequences

• a(n) = 531441*n^2 - 322218*n + 48842.at n=8A157670
• The smallest prime p such that tau(p-1) + tau(p+1) = prime(n), or 0 if no such prime exists; where tau(k) is the number of divisors of k.at n=25A189536
• Prime numbersat n=2444835