# A171006 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 1 4 6 5 1 6 12 7 60 8 200 9 150 10 700 11 2450 12 7056 13 8820 14 31752 15 97020 16 261360 17 426888 18 1359072 19 3864861 20 10020010 21 19324305 22 57257200 23 155739584 24 393853824 25 851005584 26 2405321568 27 6347376360 28 15774544800 29 37026362100 30 101219995800 31 261312846300