542557domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of arrangements of n+3 numbers in 0..6 with each number being the sum mod 7 of three others.at n=3A183889T(n,k)=Number of arrangements of n+3 numbers in 0..k with each number being the sum mod (k+1) of three others.at n=39A183892Prime numbersat n=44768