1467392domain: NAppears in sequencesNumerator of Sum_{k=1..n} 2^k/k.at n=11A108866Numerator of Sum_{k=1..2n+1} 2^k/k.at n=5A229727Number of (n+1) X (3+1) 0..2 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=23A237632