408337domain: NPropertiesPrimalityPrimeyesAppears in sequencesColumn 3 of triangle A117418.at n=9A117421Triangle T, read by rows, equal to the matrix square of triangle A117418; also equals a column bisection of triangle A117418: column 2k+1 of T^(1/2) equals column k of T.at n=56A117427Prime numbersat n=34479