# A107378 (b-file synthesized from sequence entry) 0 0 1 1 2 1 3 2 4 4 5 11 6 35 7 122 8 440 9 1609 10 5913 11 21770 12 80204 13 295555 14 1089227 15 4014322 16 14794864 17 54526993 18 200961457 19 740652050 20 2729705364 21 10060448635 22 37078224883 23 136653426026 24 503642204200 25 1856195468633 26 6841089945545