# A149658 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 17 4 59 5 239 6 995 7 3967 8 16685 9 72029 10 308013 11 1326509 12 5839973 13 25751313 14 113486965 15 505253549 16 2264923651 17 10149497751 18 45647471491 19 206545814791 20 936339133515 21 4249377202291 22 19357161132847 23 88430112102083 24 404359447342391 25 1852486534010095 26 8508801394789043 27 39136469862569959