# A330645 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 2 4 8 5 20 6 60 7 212 8 632 9 2508 10 8280 11 34256 12 127712 13 542984 14 2252432 15 9873216 16 44557424 17 202661012 18 975470880 19 4627469192 20 23413518704 21 116147688600 22 611882489152 23 3174544514192 24 17312022302368 25 93772475206800 26 527582381206400 27 2975078868145952