616169domain: NPropertiesPrimalityPrimeyesAppears in sequencesDenominators of continued fraction convergents to sqrt(881).at n=15A042703Number of nondecreasing integer sequences of length 26 with sum zero and sum of absolute values 2n.at n=20A158160Primes p such that for each digit of p, 2*p*(digit) + 1 is prime.at n=23A382199Prime numbersat n=50321