1049599

Properties

Appears in sequences

• Number of reversible string structures with n beads using exactly two different colors.at n=21A056326
• a(n) = 4^n + 2^n - 1.at n=10A099393
• Primes of form n^4 + n^2 - 1.at n=12A174819
• Primes of the form 4^k + 4^m - 1, where k and m are positive integers.at n=27A234310
• Primes of the form m = 4^i + 4^j - 1, where i > j >= 0.at n=21A239714
• Numbers k such that A163511(k) is an eleventh power.at n=11A366391
• Prime numbersat n=82102