2441407

Properties

Appears in sequences

• a(n) = (5^n + 3)/4.at n=10A047850
• Primes of the form (5^k-1)/4 or (5^k+3)/4.at n=6A088554
• a(n) = (Sum_{i=0..n} 5^i) + 1 - (Sum_{i=0..n} 5^i) mod 2.at n=9A102239
• Number of cyclic subgroups of the group (C_n)^10, where C_n is the cyclic group of order n.at n=4A344306
• Prime numbersat n=179097