# A163091 (b-file synthesized from sequence entry)
0 1
1 15
2 210
3 2940
4 41055
5 573300
6 8005725
7 111793500
8 1561106820
9 21799608285
10 304414090890
11 4250899269435
12 59360407871310
13 828920611657320
14 11575213262103855
15 161638593827703720
16 2257153663002754425
17 31519345335542489880
18 440142444293996873520
19 6146237150764726493205