81333domain: NAppears in sequencesNumber of positive integers <= 2^n of form 6*x^2 + 7*y^2.at n=20A054182Number of 5-block tricoverings of an n-set.at n=4A060483Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4).at n=25A060487Number of (w,x,y,z) with all terms in {1,...,n} and w>=average{x,y,z}.at n=20A212089