# A087224 (b-file synthesized from sequence entry) 0 1 1 3 2 7 3 19 4 50 5 133 6 352 7 935 8 2482 9 6584 10 17473 11 46365 12 123034 13 326478 14 866338 15 2298895 16 6100296 17 16187616 18 42955106 19 113984740 20 302467434 21 802621041 22 2129817812 23 5651638433 24 14997065388 25 39795888008 26 105601506802