5184000000domain: NAppears in sequencesNumber of (n+1)X(1+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=12A236990Denominator of Sum_{k=1..n} (-1)^(k+1)/k^6.at n=5A334605