230209

Appears in sequences

• Number of primes less than 100000n.at n=31A038814
• a(n) = C(n+6, 6) - n - 1.at n=20A062989
• Number of (n+1) X 6 binary arrays with every 2 X 2 subblock commuting with each of its horizontal and vertical 2 X 2 subblock neighbors.at n=18A186458