48121

Properties

Appears in sequences

• Numbers k such that 4^k - 3^k is prime.at n=18A059801
• Non-palindromic primes which on subtracting their reversal gives perfect cubes.at n=21A080178
• Numbers k such that 2*prime(k)+1, 2*prime(k+1)+1 and 2*prime(k+2)-1 are also consecutive primes.at n=10A103851
• Numbers n such that 2*P(n)+1, 2*P(n+1)+1, and 2*P(n+2)-1 are also consecutive primes with P(n+1)=P(n)+6 and P(n+2)=P(n+1)+2 with P(i)=i-th prime.at n=7A103852
• Prime(k), where k is such that (1 + Sum_{i=1..k} prime(i)^19) / k is an integer.at n=16A233769
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 539", based on the 5-celled von Neumann neighborhood.at n=7A272802
• Numbers n such that 4^n + (-3)^n is prime.at n=20A286348
• Terms k of A112998 such that k+2 is nonsquarefree.at n=26A328160
• Numbers k such that d(k) < d(k+1) < d(k+2) < d(k+3) < d(k+4), where d(n) is the number of divisors of n.at n=5A364717
• Prime numbersat n=4956