# A217351 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 4 5 6 6 21 7 24 8 27 9 30 10 54 11 70 12 126 13 369 14 435 15 612 16 787 17 1275 18 2155 19 2436 20 5734 21 6016 22 16107 23 25786 24 34266 25 38841 26 45834 27 46584