# A100702 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 19 4 55 5 163 6 487 7 1459 8 4375 9 13123 10 39367 11 118099 12 354295 13 1062883 14 3188647 15 9565939 16 28697815 17 86093443 18 258280327 19 774840979 20 2324522935 21 6973568803 22 20920706407 23 62762119219 24 188286357655 25 564859072963