# A025558 (b-file synthesized from sequence entry)
1 1
2 4
3 9
4 48
5 50
6 360
7 735
8 2240
9 2268
10 25200
11 25410
12 332640
13 334620
14 336336
15 675675
16 11531520
17 11571560
18 220540320
19 221152932
20 221707200
21 222211080
22 5121436320
23 5131136010
24 25700298624
25 25741485000
26 77338861600
27 77445096300
28 2248776129600
29 2251453244040