50859

Appears in sequences

• Indices of primes at which the prime race 4k-1 vs. 4k+1 is tied.at n=39A038691
• Numbers whose base-15 representation has exactly 5 runs.at n=8A043672
• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1101-0111-0010 pattern in any orientation.at n=14A147245