75967domain: NPropertiesPrimalityPrimeyesAppears in sequencesSum_{k>=1} k^n/Catalan(k) rounded to nearest integer.at n=8A100666Number of length 4 1..(n+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.at n=20A258635Prime numbersat n=7479