# A057051 (b-file synthesized from sequence entry)
1 1
2 1
3 6
4 18
5 73
6 255
7 950
8 3473
9 13006
10 48840
11 185353
12 706404
13 2706608
14 10404625
15 40126430
16 155133811
17 601119492
18 2333671638
19 9075290555
20 35345525798
21 137847145330
22 538258922839
23 2104101413400
24 8233434921693
25 32247613423563
26 126410623214720
27 495918571702575