3841992000domain: NAppears in sequencesDenominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^2)).at n=10A069046Denominator(sum(i=1,n,1/i^4))/denominator(sum(i=1,n,1/i^2)).at n=11A069046Least common multiple of first n proper prime powers.at n=12A274461