# A339668 (b-file synthesized from sequence entry) 1 0 2 2 3 6 4 14 5 30 6 60 7 114 8 204 9 348 10 564 11 884 12 1332 13 1972 14 2844 15 3976 16 5470 17 7396 18 9852 19 12962 20 16802 21 21522