89341domain: NAppears in sequencesNumerator of Sum_{k=1..n} k^n/n^k.at n=5A119758Number of (n+2) X 9 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..1 introduced in row major order.at n=19A204380