# A148332 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 14 5 42 6 140 7 481 8 1740 9 6517 10 25071 11 98909 12 398029 13 1630133 14 6776780 15 28545990 16 121634875 17 523592344 18 2274403486 19 9959936977 20 43935043231 21 195083730751 22 871408143675 23 3913633986985 24 17664173896079 25 80090608816509 26 364658344537497 27 1666732699542652 28 7645308725638059