# A218540 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 5
4 10
5 66
6 154
7 1122
8 2805
9 21505
10 55913
11 442221
12 1179256
13 9524760
14 25852920
15 211993944
16 582983346
17 4835332458
18 13431479050
19 112400272050
20 314720761740
21 2652646420380
22 7475639911980
23 63380425340700
24 179577871798650
25 1530003467724498