# A098460 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 33 4 321 5 3945 6 59445 7 1056825 8 21677985 9 503799345 10 13084021125 11 375524312625 12 11803392302625 13 403235809601625 14 14876913457531125 15 589498927632239625 16 24969077812488434625 17 1125803018759825030625