202441domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of div(x(i),x(i+1)), where div(a,b)=a/b produces the integer quotient implying a nonnegative remainder, equal to zero.at n=18A190073Prime numbersat n=18182