# A140903 (b-file synthesized from sequence entry) 0 1 1 84 2 2520 3 41580 4 457380 5 3737448 6 24293412 7 131589315 8 614083470 9 2530768240 10 9386849472 11 31803696288 12 99604982880 13 291153026880 14 800670823920 15 2085276513474 16 5172303508911 17 12276881393700 18 27999904933000 19 61578738292500 20 130994770549500 21 270273795363000