144045379domain: NPropertiesPrimalityPrimeyesAppears in sequencesDifference between numerator and denominator of the sum of all matrix elements of n X n Hilbert matrix M(i,j)=1/(i+j-1) (i,j = 1..n), A117731[n] - A117664[n].at n=9A119030Prime numbersat n=8127842