87751

Properties

Appears in sequences

• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation.at n=14A147377
• a(0) = 1; a(n) is the smallest integer k > a(n-1) such that 2^(k-1) == 1 (mod a(n-1)*k).at n=15A306826
• Prime numbersat n=8523