# A349846 (b-file synthesized from sequence entry) 0 -1 1 6 2 10 3 28 4 90 5 308 6 1092 7 3960 8 14586 9 54340 10 204204 11 772616 12 2939300 13 11232648 14 43088200 15 165815280 16 639859770 17 2475036900 18 9593714460 19 37255818600 20 144915581580 21 564514356120 22 2201964031800 23 8599360982160 24 33619842137700 25 131570223027048 26 515366318553912