197203domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that are concatenations of k with k + 6.at n=24A032629Lucky numbers that are decimal concatenations of n with n + 6.at n=21A032656Sequence of coefficients of x in marked mesh pattern generating function Q_{n,132}^(0,0,2,0)(x).at n=15A212338Prime numbersat n=17751