# A058645 (b-file synthesized from sequence entry)
0 0
1 1
2 10
3 54
4 224
5 800
6 2592
7 7840
8 22528
9 62208
10 166400
11 433664
12 1105920
13 2768896
14 6823936
15 16588800
16 39845888
17 94699520
18 222953472
19 520486912
20 1205862400
21 2774532096
22 6343884800
23 14422114304
24 32614907904
25 73400320000