37371domain: NAppears in sequencesIntegers k such that nextprime(k^5) - prevprime(k^5) = 4.at n=30A090123Semiprimes formed by concatenating n, n, and 1 for n = 1, 2, 3,....at n=15A210711Number of pairs of orthogonal (diagonal, antidiagonal) X-rays for all permutations of [n].at n=8A290280