203434domain: NAppears in sequencesa(n) = Sum_{1 <= i < j <= n} (j-i)^3.at n=20A024166a(n) is the smallest number m such that each of the numbers m-1, m and m+1 is a product of n distinct primes.at n=2A093550Numbers n such that n-1, n, and n+1 are the product of 4 distinct primes.at n=0A248203