57092domain: NAppears in sequences[ exp(8/23)*n! ].at n=7A030821Eighth convolution of Schroeder's (second problem) numbers A001003(n), n>=0.at n=6A111996a(n) = Sum_{1 <= x_1 <= x_2 <= x_3 <= x_4 <= n} gcd(x_1, x_2, x_3 , x_4, n).at n=31A343518Number of set partitions of {1..n} whose block-medians have integer median.at n=9A361864