357593domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of 2 X 2 matrices having all terms in {-n,...,0,...,n} and nonnegative determinant.at n=14A211147Numbers obtained by removing the first a(n) > 0 decimal digits of Pi set new records for closeness to Pi.at n=9A256516Prime numbersat n=30568