# A151406 (b-file synthesized from sequence entry) 0 1 1 0 2 1 3 2 4 4 5 8 6 31 7 74 8 180 9 598 10 1834 11 4788 12 14996 13 49482 14 143789 15 435354 16 1453804 17 4561596 18 13938918 19 45872900 20 150436644 21 473005586 22 1538113866 23 5131580610 24 16631971200 25 54060256628 26 180817311524 27 599398780812 28 1965766211768 29 6566285301920 30 22047832597671 31 73217323048944 32 244741654013110