147050domain: NAppears in sequencesNumber of discordant permutations.at n=13A000562Even 9-gonal (nonagonal) pyramidal numbers.at n=36A218329Sum over each antidiagonal of A248017.at n=9A248027G.f. satisfies A(x) = 1 + x * (1 + x)^2 * A(x * (1 + x)).at n=10A360887