# A094538 (b-file synthesized from sequence entry) 0 0 1 0 2 3 3 9 4 33 5 99 6 315 7 945 8 2883 9 8649 10 26091 11 78273 12 235233 13 705699 14 2118339 15 6355017 16 19068729 17 57206187 18 171629595 19 514888785 20 1544699313 21 4634097939 22 13902392691 23 41707178073 24 125121830427 25 375365491281