# A316697 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 5 5 10 6 24 7 49 8 112 9 241 10 548 11 1218 12 2839 13 6547 14 15572 15 37179 16 90555 17 222065 18 552576 19 1384820 20 3506475 21 8936121 22 22941280