66104

Appears in sequences

• Number of n X 2 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=10A280118
• a(n) is obtained by applying the map k -> composite(k) n times, starting at n.at n=43A280327
• Expansion of B(x)/sqrt(1 + 2*(B(x)-1)/3), where B(x) is the g.f. of A004355.at n=5A385719