62948

Appears in sequences

• Number of triangles in an n X n unit grid that have minimal possible area (of 1/2).at n=17A088658
• Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001011.at n=12A261550
• a(n) = Sum_{i=1..n, j=1..n, gcd(i,j)=2} (n+1-i)*(n+1-j).at n=34A331761