94510277domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=6A278605T(n,k)=Number of nXk 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.at n=29A278610Prime numbersat n=5462965