# A307900 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 10 5 24 6 61 7 150 8 382 9 964 10 2452 11 6307 12 16379 13 42989 14 113965 15 305035 16 823632 17 2241814 18 6145670 19 16956972 20 47059076 21 131279567