58983domain: NAppears in sequencesa(n) = 3^n - (n+1)*(n+2)/2.at n=10A061982Numbers k such that A003313(k) = A003313(5*k).at n=20A116460Number of n X 1 arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X 1 array.at n=9A217995