# A267840 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 3
5 15
6 105
7 525
8 3255
9 17703
10 112455
11 669735
12 4485195
13 29023995
14 205768563
15 1432735395
16 10728177915
17 79665069435
18 627587657595
19 4933313794683
20 40724759240235
21 336819780949995
22 2902978545030795
23 25135723046974155
24 225455477000793963