# A375742 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 1
4 1
5 1
6 2
7 4
8 12
9 20
10 140
11 2380
12 30940
13 4053140
14 976806740
15 1800254821820
16 61120451455610820
17 9679503282638355804820
18 644895289728732254890713095060
19 11032242225369970870930018496422256556580
20 123023889999524997120705110893674654359714272362614340