96702domain: NAppears in sequencesNumber of rich binary words of length n.at n=18A216264Triangle T(n,k) read by rows: T(n,k) = -binomial(n+1,k) + Sum_{i=0..k} Sum_{j=0..i+1} (i+1)^(n-i+j)*(-1)^(k-i)/(j!*(k-i)!) for 0 <= k <= n.at n=50A380179Second component B of the pairs (A, B) from A389379.at n=24A389390