526018domain: NAppears in sequencesNumber of permutations b of length n that satisfy the Diaconis-Graham inequality I_n(b) + EX_n(b) <= D_n(b) with equality.at n=9A301897Array read by downward antidiagonals: A(n,k) = Sum_{j=0..k + (k mod 3) + 1} A(n-1,j) with A(0,k) = 1, n >= 0, k >= 0.at n=54A369518