109121domain: NPropertiesPrimalityPrimeyesAppears in sequencesFloor of the area of consecutive Prime-Indexed Prime triangles.at n=20A119659a(n) is the row number of the Trithoff (tribonacci) array where we can find the tail of the following sequence: apply the difference operator n times to the tribonacci sequence.at n=17A354215Prime numbersat n=10375