4925281domain: NPropertiesPrimalityPrimeyesAppears in sequencesThe number of n X n (0,1)-matrices with a 1-width of 1.at n=4A005019a(n) = (n+1)^5 - n^5.at n=31A022521Primes of form (k+1)^5 - k^5 = A022521(k).at n=9A121616Prime numbersat n=343629