# A127618 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 22
4 117
5 590
6 3018
7 15378
8 78440
9 399992
10 2039852
11 10402480
12 53049048
13 270531368
14 1379614800
15 7035549312
16 35878823312
17 182969359520
18 933079279328
19 4758375627808
20 24266039468160
21 123748253080832
22 631072497876672