# A181369 (b-file synthesized from sequence entry)
2 1
3 2
4 11
5 44
6 175
7 682
8 2617
9 9920
10 37232
11 138600
12 512412
13 1883328
14 6887056
15 25074080
16 90935120
17 328658944
18 1184206208
19 4255136384
20 15251769536
21 54544092160
22 194662703872
23 693427554816
24 2465864757504
25 8754793857024