# A189878 (b-file synthesized from sequence entry) 1 1 2 0 3 0 4 2 5 10 6 4 7 28 8 20 9 56 10 72 11 200 12 644 13 2940 14 9152 15 39200 16 166100 17 739924 18 3586840 19 18640500 20 107580592 21 547737844 22 3080550788