1339691domain: NPropertiesPrimalityPrimeyesAppears in sequencesDenominators of continued fraction convergents to sqrt(641).at n=14A042231a(n) is the constant term in expansion of Product_{k=1..n} (x^(k^4) + 1 + 1/x^(k^4)).at n=25A369358Prime numbersat n=102831