202289domain: NPropertiesPrimalityPrimeyesAppears in sequencesIndices of the start of a string of 24 consecutive squares whose sum is a square.at n=25A094196Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.at n=34A239563Prime numbersat n=18169