# A001194 (b-file synthesized from sequence entry)
2 3
3 9
4 54
5 450
6 4725
7 59535
8 873180
9 14594580
10 273648375
11 5685805125
12 129636356850
13 3217338674550
14 86331921100425
15 2490343877896875
16 76844896803675000
17 2525635608280785000
18 88081541838792376875
19 3248654513701342370625