74854

Appears in sequences

• Number of (7+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=15A258560
• a(n)=least number m such that gcd(prime(m)+2,prime(m+1)+2) = 2*n-1.at n=18A268863
• Number of symmetrically unique Dyck paths of semilength n and height six.at n=7A291890