2329081domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that, in base 17, p = the cumulative sum of the digit-mult(digit-sum(prime)) of each prime <= p.at n=5A242479a(n) is the number of 2 X 2 matrices with entries in {1, ..., n} that are not the product of two 2 X 2 positive integer matrices.at n=43A260550Prime numbersat n=171475