69426531domain: NAppears in sequencesCubes that become prime numbers when prefixed with an 8.at n=20A167732a(n) = (p1 + p2)/216 such that p1 >= 5 and p2 = p1 + 2 are twin primes and p1 + p2 is a k-th power with k >= 3.at n=22A330980Numbers k whose base-10 digits can be split into two parts, q and r, with k = (|q-r|)^3.at n=4A379591