29189160domain: NAppears in sequencesa(n) = lcm(1,2,3,...,n) * (sum of Farey fractions of order n).at n=15A093627Number of nX2 arrays containing 2 copies of 0..n-1 with every element equal to or 1 greater than any northeast neighbor modulo n and the upper left element equal to 0.at n=9A267832