645208

Appears in sequences

• Number of (n+1)X(2+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock.at n=4A236612
• Number of (n+1)X(5+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock.at n=1A236615
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock.at n=16A236618
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median of every 2X2 subblock.at n=19A236618
• Largest even k such that h(-k) = 2n, where h(D) is the class number of the quadratic field with discriminant D; or 0 if no such k exists.at n=48A357573