# A108152 (b-file synthesized from sequence entry) 0 1 1 0 2 2 3 7 4 25 5 91 6 330 7 1197 8 4342 9 15750 10 57131 11 207235 12 751717 13 2726752 14 9890925 15 35877996 16 130142590 17 472074687 18 1712387237 19 6211453675 20 22531210186 21 81728925145 22 296460649482 23 1075371008922 24 3900763250875 25 14149492419951