202083

Appears in sequences

• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2^(p+1) + 2 - n and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = 1 and a(2) = a(3) = 3.at n=19A049925
• Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.at n=15A147333