# A116509 (b-file synthesized from sequence entry) 1 41 2 109 3 221 4 629 5 1285 6 3665 7 7489 8 21361 9 43649 10 124501 11 254405 12 725645 13 1482781 14 4229369 15 8642281 16 24650569 17 50370905 18 143674045 19 293583149 20 837393701 21 1711127989 22 4880688161 23 9973184785 24 28446735265 25 58127980721