# A340498 (b-file synthesized from sequence entry) 0 3 1 6 2 16 3 56 4 216 5 856 6 3416 7 13656 8 54616 9 218456 10 873816 11 3495256 12 13981016 13 55924056 14 223696216 15 894784856 16 3579139416 17 14316557656 18 57266230616 19 229064922456 20 916259689816