# A122892 (b-file synthesized from sequence entry) 4 1 5 10 6 70 7 424 8 2382 9 12804 10 66946 11 343772 12 1744314 13 8780912 14 43976688 15 219546976 16 1094132461 17 5448766458 18 27135655714 19 135218356264 20 674461583180 21 3368432133000 22 16847360404260 23 84396523333080 24 423485559461250