87635138366domain: NAppears in sequencesNumber of tournament sequences: sequences (a_1, a_2, ..., a_n) with a_1 = 1 such that a_i < a_{i+1} <= 2*a_i for all i.at n=10A008934Number of n X n symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 9 ones in any row.at n=9A162099