# A320651 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 7 4 14 5 36 6 90 7 213 8 520 9 1271 10 3082 11 7493 12 18238 13 44324 14 107782 15 262142 16 637368 17 1549870 18 3768886 19 9164499 20 22285034 21 54190024 22 131771616 23 320424614 24 779166270 25 1894671121 26 4607207304 27 11203190618 28 27242414612 29 66244451632 30 161084380040 31 391703392954