137617

Appears in sequences

• Trajectory of 3 under map n->37n+1 if n odd, n->n/2 if n even.at n=28A037116
• Number of n X 3 binary arrays with every 1 having exactly two king-move neighbors equal to 1.at n=12A183444
• Maximum value of (1/2)*Sum_{i=1..n} Sum_{j=1..n} Sum_{k=1..n} Sum_{l=1..n} gcd(b(i,j),b(k,l)) * ((i-k)^2+(j-l)^2) for an n X n matrix b filled with the integers 1 to n^2.at n=7A261177