# A173622 (b-file synthesized from sequence entry)
2 1
3 6
4 21
5 30
6 180
7 546
8 140
9 1430
10 6120
11 17710
12 630
13 10920
14 65835
15 245700
16 695640
17 2772
18 81396
19 690690
20 3322704
21 11515140
22 32212719
23 12012
24 596904
25 7125300
26 44170896
27 187336380
28 619851960
29 1721286532
30 51480
31 4326300
32 72624816