# A052317 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 6
4 56
5 730
6 12372
7 259574
8 6511920
9 190413234
10 6364960940
11 239556803662
12 10028763883272
13 462366507311306
14 23282257730716740
15 1271520006077859750
16 74865320814990626912
17 4727699146425478764898
18 318763676354643090937692
19 22856568223852002933212798