# A112839 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 34
5 136
6 666
7 3577
8 23353
9 200704
10 2062593
11 24878084
12 373006265
13 6917185552
14 153624835953
15 4155902941554
16 138450383756352
17 5602635336941568
18 274540864716936000
19 16486029239132118530
20 1209110712606533552257