# A148107 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 10 5 27 6 84 7 265 8 892 9 3078 10 10917 11 39683 12 147762 13 559640 14 2154331 15 8416964 16 33261595 17 132862775 18 536061253 19 2182072592 20 8952086612 21 37000546739 22 153950290800 23 644361566782 24 2712078227312 25 11474353274885 26 48776461977010 27 208261335853889 28 892909478125003 29 3842953777938297