# A297200 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 6
5 24
6 119
7 703
8 4819
9 37596
10 328871
11 3187627
12 33907426
13 392693219
14 4918535904
15 66246158633
16 954739609059
17 14660169150206
18 238933675330056
19 4119463404086442
20 74907534899129351
21 1432718565376182929