757770domain: NAppears in sequencesSmallest oblong (promic) number containing exactly n 7's.at n=3A048544Largest x such that 1/x + 1/y + 1/z = 1/n.at n=28A082986a(n) = n*(n+1)*(n*(n+1)+1).at n=30A169938a(n) = n^4 + 6n^3 + 14n^2 + 15n + 6.at n=28A176780Oblong numbers which are products of six distinct primes.at n=18A359127